[actions-gh-release] Add labels option in commitCategories

[t-kikuc]

What this PR does:

Enabled to categorize PRs by their labels.

Why we need it:

• Currently, only prefix and body are supported for matching commitCategories.
• Labels are more useful than commit body/prefixes.
  Especially, we can add labels even after merging commits.

Note:

We need the following steps to fix the issue.

1. Merge this PR
2. Release a new version of /tool/actions-gh-release in this repo [Added]
3. Merge Add docs of labels in commitCategories actions-gh-release#36
4. Release a new version of pipe-cd/actions-gh-release
5. Update the RELEASE file: contains to labels

Which issue(s) this PR fixes:

Fixes #5024

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 25.28%. Comparing base (920620e) to head (6102e24).
Report is 21 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5327      +/-   ##
==========================================
+ Coverage   25.25%   25.28%   +0.02%     
==========================================
  Files         444      444              
  Lines       47554    47554              
==========================================
+ Hits        12012    12022      +10     
+ Misses      34599    34590       -9     
+ Partials      943      942       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[t-kikuc]

I'll make it Ready-for-review after testing.

[t-kikuc]

Postpone.