misc: use `kat` to verify changelogs #2276

	name: Changelog verification

	permissions:
	id-token: write

	on:
	pull_request:
	types: [ opened, synchronize, reopened, labeled, unlabeled ]
	branches:
	- main
	- '*-main'

	jobs:
	changelog-verification:
	runs-on: ubuntu-latest
	steps:
	- name: Configure AWS Credentials
	uses: aws-actions/configure-aws-credentials@v4
	with:
	role-to-assume: ${{ secrets.CI_AWS_ROLE_ARN }}
	aws-region: us-west-2

	- name: Setup kat
	uses: awslabs/aws-kotlin-repo-tools/.github/actions/setup-kat@main

	- uses: actions/checkout@v2
	- name: Check for new changelog entry
	if: ${{ !contains(github.event.pull_request.labels.*.name, 'no-changelog') }}
	run: \|
	git fetch origin ${{ github.base_ref }} --depth 1
	if ! git diff remotes/origin/${{ github.base_ref }} --name-only \| grep -P "\.changes/[0-9a-f-]+\.json"; then
	echo "::error ::No new/updated changelog entry found in /.changes directory. Please either:"
	echo "::error ::* Add a changelog entry (see CONTRIBUTING.md for instructions) –or–"
	echo "::error ::* Add the 'no-changelog' label to this PR (in rare cases not warranting a changelog entry)"
	exit 1
	fi

	- name: Verify all changelogs
	run: \|
	if ! kat changelog ls; then
	echo "::error ::Changelog verification failed. Please check the format of your changelog entry."
	exit 1
	fi

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