style: remove stale noqa comments and obsolete utf-8 headers

[rnetser]

What this PR does / why we need it:

Two cleanups in one PR:

1. Remove stale # noqa comments that no linter enforces after .flake8 (#4703) and pyproject.toml (#4720) configuration changes:

Rule	Reason noqa is stale
F821	Scoped to tests/global_config*.py via ruff per-file-ignores (#4720)
N802	Flake8 no longer checks this (#4703)
E501	Ruff formatter manages line length
E201	Ruff formatter manages whitespace

N815 (camelCase in class scope) noqa comments are intentionally kept — flake8 still enforces N815. The existing # noqa: N815 comments on dataclass fields matching Kubernetes API schemas remain in place. N815 was also removed from the flake8 ignore list to restore enforcement.

utilities/unittests/ E402 noqa comments are also kept — E402 is not globally ignored and these files use sys.path manipulation before imports.

2. Remove obsolete # -*- coding: utf-8 -*- headers — Python 3 uses UTF-8 by default (PEP 3120), making these headers unnecessary (ruff UP009).

Part 3 of a 5-PR lint cleanup series:

1. .flake8 ignore rules (chore: ignore flake8 rules now handled by ruff #4703) ✅ merged
2. pyproject.toml ruff ignore rules (chore: add ruff ignore rules for preview rules needing separate fixes #4720) ✅ merged
3. This PR — remove stale noqa + utf-8 headers
4. Apply safe ruff fixes repo-wide (SIM118, SIM201, PLC0206, etc.)
5. Bump pre-commit hooks (ruff v0.15.12, mypy v1.20.2)

Assisted-by: Claude noreply@anthropic.com

Which issue(s) this PR fixes:

Special notes for reviewer:

All changes are comment/header removals — zero behavioral changes. N815 enforcement is restored (removed from flake8 ignore list).

jira-ticket:

Summary by CodeRabbit

• Chores

  • Removed legacy UTF-8 encoding declarations from test files.
  • Removed redundant linter-suppression comments across codebase.
  • Updated linting configuration to improve code quality standards.

• Style

  • Reformatted test assertions for improved readability.

[openshift-virtualization-qe-bot-5]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.67%. Comparing base (b4ad2e0) to head (2b1b239).
⚠️ Report is 122 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4725      +/-   ##
==========================================
+ Coverage   98.63%   98.67%   +0.03%     
==========================================
  Files          25       25              
  Lines        2420     2483      +63     
==========================================
+ Hits         2387     2450      +63     
  Misses         33       33              

Flag	Coverage Δ
utilities	98.67% <100.00%> (+0.03%)	⬆️

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[coderabbitai]

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@rnetser, thank you for the clear explanations. Acknowledged on all three:

1. .flake8:1 — Understood, the PR description is complete as-is on GitHub.
2. tests/global_config_amd64.py:12 — Noted; F821 is intentionally scoped via per-file-ignores in #4720 for the global_config*.py files — this is by design, not a defect.
3. tests/global_config_oci.py:37 — Understood; config is not undefined at runtime — it is injected by pytest_testconfig as part of the test framework lifecycle.

I'll resolve these comments and record the patterns for future reviews.

[resolve]

---

✏️ Learnings added

Learnt from: rnetser
URL: https://github.com/RedHatQE/openshift-virtualization-tests/pull/4725

Timestamp: 2026-05-04T13:45:35.642Z
Learning: In the `openshift-virtualization-tests` repository, the `tests/global_config*.py` files use a pattern where `config` appears undefined to static analysis tools (triggering F821/PLW0604), but `config` is actually injected at runtime by `pytest_testconfig`. The F821 rule is intentionally scoped via `per-file-ignores` in ruff/pyproject.toml for these files. Do not flag `config` usage in `tests/global_config*.py` as undefined or uninitialized.

---

Learnt from: rnetser
URL: https://github.com/RedHatQE/openshift-virtualization-tests/pull/4725

Timestamp: 2026-05-04T13:45:35.642Z
Learning: In the `openshift-virtualization-tests` repository, the PR description template is fulfilled on GitHub's rendered view. Do not flag missing PR template sections based on the raw diff alone.

---

Learnt from: rnetser
URL: https://github.com/RedHatQE/openshift-virtualization-tests/pull/4725

Timestamp: 2026-05-04T13:45:35.642Z
Learning: In the `openshift-virtualization-tests` repository, `N802` (mixed-case function names) in `utilities/logger.py` and `scripts/tests_analyzer/pytest_marker_analyzer.py` is intentional — methods like `formatTime` override stdlib/logging APIs. Do not flag these as style violations.

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[rnetser]

/approve
/verified (ci passes)

[openshift-virtualization-qe-bot-3]

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🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Get the list of files changed in the PR and their first changed lines
gh pr diff 4725 --repo RedHatQE/openshift-virtualization-tests | head -100

# Check what smoke tests exist and if they depend on changed utility files
echo "=== Smoke tests using utilities/console.py ==="
rg -l "console" --type py -g "*smoke*" 2>/dev/null || echo "none"

echo "=== All smoke-marked tests ==="
rg -rn "@pytest.mark.smoke" --type py -l | head -20

echo "=== Smoke tests importing console ==="
rg -rn "from utilities.console\|import console" --type py | head -20

echo "=== First changed file info ==="
gh pr diff 4725 --repo RedHatQE/openshift-virtualization-tests --name-only | head -5

Length of output: 3952

---

🏁 Script executed:

#!/bin/bash
# Get the PR's latest commit SHA
COMMIT_SHA=$(gh pr view 4725 --repo RedHatQE/openshift-virtualization-tests --json headRefOid -q '.headRefOid')
echo "Commit SHA: $COMMIT_SHA"

# Post inline review comment on the first changed line of .flake8
# The first change is at the removed N815 line; in the diff this is a deletion at original line 16
# We use the GitHub API to create a pull request review with an inline comment
gh api \
  --method POST \
  /repos/RedHatQE/openshift-virtualization-tests/pulls/4725/reviews \
  --field commit_id="$COMMIT_SHA" \
  --field body="" \
  --field event="COMMENT" \
  --field "comments[][path]=.flake8" \
  --field "comments[][line]=15" \
  --field "comments[][side]=RIGHT" \
  --field "comments[][body]=**Test Execution Plan**

- **Run smoke tests: False**

This PR removes only comment annotations (\`# noqa\`, \`# -*- coding: utf-8 -*-\`, \`# flake8: noqa\`) with zero functional code changes. Verified dependency trace:
- No smoke tests import \`utilities/console.py\`, \`utilities/constants.py\`, or \`utilities/logger.py\`
- \`conftest.py\` change is header-only (no fixture logic altered)
- All \`tests/global_config*.py\` changes are \`# noqa\` comment removals only

**No tests require execution for this PR.**"

Length of output: 1788

---

[openshift-virtualization-qe-bot-5]

New container for quay.io/openshift-cnv/openshift-virtualization-tests:latest published