deprecate gha artifact name

[tmclaugh]

When I wrote this initially I was under the belief that runs would overwrite artifacts from previous runs if the name wasn't unique but upon looking at GitHub recently that's not the case. Removing this because we don't need it

[Copilot]

Pull request overview

This PR removes the artifact naming override logic from the gha-setup-workspace composite action, based on the updated understanding that GitHub Actions artifact names do not need to be made unique per-run to avoid overwrites.

Changes:

• Removed the artifact_name_override input and the artifact-name output from the action interface.
• Deleted the ServerlessOpsIO/gha-artifact-name@v1 step and stopped passing an explicit artifact name into actions/download-artifact.
• Updated README documentation to reflect the simplified behavior and removed the artifact naming configuration section.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
action.yaml	Removes artifact name override input/output and the intermediate naming step; download step now relies on download-artifact defaults.
README.md	Removes artifact naming docs and updates inputs/outputs and behavior description accordingly.

Comments suppressed due to low confidence (1)

action.yaml:12

• Removing the artifact_name_override input and artifact-name output is a breaking interface change for existing action consumers. Consider keeping the input/output as deprecated (no-op) for a transition period, or publishing this change under a new major tag (e.g., v2) so existing workflows pinned to @v1 don't unexpectedly break.

inputs:
  checkout_fetch_depth:
    description: Depth to fetch repository
    required: false
    default: '1'
  checkout_artifact:
    description: Whether to checkout artifact instead of source
    required: false
    default: 'false'

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