Check release workflow

[briandealwis]

Change draft-release workflow to use the actions-ecosystem/action-regex-match workflow for extracting regexs from the PR commit message, and to ignore the trailing PR number.

Although it adds the ability to include pre-release labels (e.g., 1.2.3-beta.1) to let us try cutting pre-release versions, our current post-release workflows (such as to publish docs to skaffold.dev) don't check that a tag is a full release.

[codecov]

Codecov Report

Merging #6188 (2043d04) into master (0b13fa0) will increase coverage by 1.18%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #6188      +/-   ##
==========================================
+ Coverage   69.92%   71.10%   +1.18%     
==========================================
  Files         481      483       +2     
  Lines       18342    21549    +3207     
==========================================
+ Hits        12825    15323    +2498     
- Misses       4562     5247     +685     
- Partials      955      979      +24     

Impacted Files	Coverage Δ
pkg/skaffold/schema/latest/v2/config.go	5.40% <0.00%> (-94.60%)	⬇️
pkg/skaffold/schema/v3alpha1/config.go	2.70% <0.00%> (-47.30%)	⬇️
pkg/skaffold/render/generate/generate.go	52.38% <0.00%> (-24.98%)	⬇️
pkg/skaffold/initializer/build/builders.go	60.00% <0.00%> (-10.00%)	⬇️
pkg/skaffold/build/gcb/types.go	44.44% <0.00%> (-9.41%)	⬇️
cmd/skaffold/app/cmd/version.go	77.77% <0.00%> (-7.94%)	⬇️
pkg/skaffold/status/provider.go	75.00% <0.00%> (-6.82%)	⬇️
pkg/skaffold/build/cluster/types.go	93.33% <0.00%> (-6.67%)	⬇️
pkg/skaffold/sync/provider.go	65.00% <0.00%> (-6.43%)	⬇️
pkg/skaffold/server/v2/endpoints.go	34.69% <0.00%> (-6.34%)	⬇️
... and 468 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0b13fa0...2043d04. Read the comment docs.

[tejal29]

@googlebot I signed it