Adding release hygiene workflows

[riya-bhatia-26]

Description

Adding release hygiene workflows that introduce two GitHub Actions workflows supporting release engineering hygiene checks. Non-blocking initially; results posted internally.

Please find the expected behavior in the below doc:

https://ibm.sharepoint.com/:w:/r/sites/hermes/_layouts/15/doc2.aspx?sourcedoc=%7B2A3ECECB-1C1A-4D8B-A769-07E70225D76C%7D&file=HCPINF-HashiGuard%20Server%20Side.docx&action=default&mobileredirect=true

These checks have been implemented as per this RFC: https://ibm.sharepoint.com/:w:/r/sites/hermes/_layouts/15/doc2.aspx?sourcedoc=%7B3744C6A5-9537-4EB9-B788-90ABF654B2E9%7D&file=IPS-HashiGuard%20-%20Unified%20CE-ENT%20Codebase%20Protection%20and%20Release%20Orchestration.docx&action=default&mobileredirect=true

Testing & Reproduction steps

Links

PR Checklist

• updated test coverage
• external facing docs updated
• appropriate backport labels added
• not a security concern

PCI review checklist

• I have documented a clear reason for, and description of, the change I am making.

• If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.

• If applicable, I've documented the impact of any changes to security controls.

  Examples of changes to security controls include using new access control methods, adding or removing logging pipelines, etc.

[hashicorp-cla-app]

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[github-actions]

Go Test Coverage: 63.2%

See the workflow run for the full per-package breakdown and downloadable HTML report.

[codecov-commenter]

Codecov Report

Caution

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✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.00%. Comparing base (c2cc6a1) to head (98c52c9).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #23621      +/-   ##
==========================================
- Coverage   65.55%   61.00%   -4.56%     
==========================================
  Files         944      778     -166     
  Lines      114480    88427   -26053     
==========================================
- Hits        75049    53945   -21104     
+ Misses      32434    29558    -2876     
+ Partials     6997     4924    -2073     

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