CI: remove some inter-job dependencies, run cross-compile task with make -j, use /tmp for Go build cache #5237

	name: validate
	on:
	pull_request:

	jobs:
	commit:
	runs-on: ubuntu-24.04
	# Only check commits on pull requests.
	if: github.event_name == 'pull_request'
	steps:
	- name: get pr commits
	id: 'get-pr-commits'
	uses: tim-actions/get-pr-commits@198af03565609bb4ed924d1260247b4881f09e7d # v1.3.1
	with:
	token: ${{ secrets.GITHUB_TOKEN }}

	- if: contains(github.head_ref, 'renovate/') != true
	name: check subject line length
	uses: tim-actions/commit-message-checker-with-regex@094fc16ff83d04e2ec73edb5eaf6aa267db33791 # v0.3.2
	with:
	commits: ${{ steps.get-pr-commits.outputs.commits }}
	pattern: '^.{0,72}(\n.)$'
	error: 'Subject too long (max 72)'

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