workflows - refine reusable workflows

[kmcfaul]

Logic in the documentation workflow may be able to be broken out into the release and a new PR workflow file to separate checkout logic while keeping the reused build portion clean.

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Jira Issue: PF-4518

[coderabbitai]

🔗 Related PRs

#12511 - fix(CI): unblock Release workflow documentation job on main pushes [merged]

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