fix: replace garbled mojibake characters with clean ASCII in comments

[57388sp]

Several Python source files contained mojibake characters — Windows CP1252
bytes misread as UTF-8 — in docstrings and comments. This was likely
introduced when files were edited in a non-UTF-8 editor.

Changes:

• Replace ΓÇö with - (em-dash mangled)
• Replace … with ... (ellipsis mangled)
• Replace → with -> (arrow mangled)
• Replace Γ£ô with [OK] (checkmark mangled)
• Remove UTF-8 BOM from cluster_info.py
• Blank hardcoded internal IPs, passwords, and lab aggregate name
  (AGGR_NAME, ONTAP_PASS, CLUSTER_PASS, node IPs) — these should
  never be committed; users set them via env vars or --env-file

No logic changes. Tests: 154/154 pass. Ruff: clean.

[github-actions]

Test Report missing or unfilled.

This PR touches python/, ansible/, or terraform/, so a populated Test Report section is required in the PR body. See TESTING.md for what to capture (environment, ONTAP version, first-run output, idempotency check, teardown).

This is a soft gate - your CI checks are unaffected - but reviewers will not approve until the report is filled in.