CI: Add the label-check workflow to verify changelog labels on each PR

[anshgoyalevil]

Which problem is this PR solving?

• resolves [Feature]: (Re)Introduce changelog-related labels and require them for PRs jaeger#4799

Description of the changes

• Add a GitHub Action that will verify that a PR has a specific categorization label before it can be merged. We already have a bunch of those labels changelog:*** labels
• Configure dependabot to use changelog:dependencies label
• Since we already use the release script from jaeger repo, everything else is setup 🚀
• One task is left, that is to create changelog labels inside this jaeger-ui repository. //cc: @yurishkuro

jaeger-ui/Makefile

Lines 2 to 5 in 1909398

	changelog:
	wget https://raw.githubusercontent.com/jaegertracing/jaeger/main/scripts/release-notes.py -O ./scripts/release-notes.py -q
	chmod 755 ./scripts/release-notes.py
	./scripts/release-notes.py --exclude-dependabot --repo jaeger-ui

How was this change tested?

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: yarn lint and yarn test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

📢 Thoughts on this report? Let us know!.

[yurishkuro]

Thanks!