RFR: 2198: Backport PRs should check if a CSR is required [v8]

[Zhao Song]

On Fri, 22 Mar 2024 20:50:41 GMT, Zhao Song <zsong at openjdk.org> wrote:

>> This patch is trying to let the pr bot automatically requires csr for a backport PR if one of the associated has a resolved CSR.
>
> Zhao Song has updated the pull request incrementally with one additional commit since the last revision:
> 
>   update

Thanks for the review!

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PR Comment: https://git.openjdk.org/skara/pull/1623#issuecomment-2018793350