ci: add and update github concurrency for heavy jobs

[paulsohn]

Description

Add github workflow concurrency option for time-consuming jobs.
For called workflows, I prefixed the callee name (+ container suffix) to uniquely distinguish the flow, although in most cases I think github.job-id would suffice.

Also updated ${{ github.workflow }}-${{ github.event.pull_request.number || github.run_id }} to (callee prefix for called workflows)-${{ github.workflow }}-${{ github.event_name }}-${{ github.ref }} for the sake of uniform convention. github.ref contains the pull request number, so it would not break:

https://docs.github.com/en/actions/reference/workflows-and-actions/contexts#github-context

For pull requests events except pull_request_target that were not merged, it is refs/pull/<pr_number>/merge.

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Notes for reviewers

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Interface changes

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Effects on system behavior

None.

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