[crac] RFR: 8350088: [CRaC] Stop & restart JFR recording on checkpoint [v8]

[Timofei Pushkin]

On Tue, 18 Feb 2025 21:32:25 GMT, Radim Vansa <rvansa at openjdk.org> wrote:

>> All JFR recordings are closed during checkpoint. After restore JDK starts new recordings with the same parameters as those running before checkpoint.
>> The recordings dumped before checkpoint are moved to a different path (`xxx.jfr` -> `xxx.<N>.jfr`, `xxx` -> `xxx.<N>` with `<N>` between 0 and 20 by default). 
>> If `-XX:StartFlightRecorder=...` is passed on restore a new recording is started.
>
> Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Don't use TRAPS in request_start_after_restore

Marked as reviewed by tpushkin (Author).

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PR Review: https://git.openjdk.org/crac/pull/203#pullrequestreview-2626879795