[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 https://github.com/pipe-cd/actions-gh-release/pull/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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 25.28%. Comparing base (920620e) to head (6102e24).

Additional details and impacted files

```diff @@ 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 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[t-kikuc]

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