chore(.github/workflows): change rules of the stale actions

[gaius-qi]

Description

This pull request updates the configuration for the stale workflow in .github/workflows/stale.yml. The changes adjust the timing and messaging for marking issues and pull requests as stale or closed.

Changes to stale workflow configuration:

• Reduced the days-before-close for issues from 60 days to 7 days and added days-before-pr-close with the same 7-day threshold.
• Adjusted the days-before-stale for pull requests to 120 days and added specific stale and close messages for pull requests.

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[Liam-Zhao]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 34.42%. Comparing base (47e6c33) to head (bf3d175).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4028      +/-   ##
==========================================
- Coverage   34.47%   34.42%   -0.06%     
==========================================
  Files         343      343              
  Lines       40211    40211              
==========================================
- Hits        13864    13843      -21     
- Misses      25434    25451      +17     
- Partials      913      917       +4     

Flag	Coverage Δ
unittests	34.42% <ø> (-0.06%)	⬇️

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see 5 files with indirect coverage changes

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