[crac] RFR: 8351701: [CRaC] CRaCEngineOptions=help cannot be used with CRaCRestoreFrom [v2]

[Timofei Pushkin]

On Wed, 12 Mar 2025 06:35:26 GMT, Timofei Pushkin <tpushkin at openjdk.org> wrote:

>> Fixes the issue and adds a regression test for it.
>
> Timofei Pushkin has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Test help being not the only engine option

[jdk/crac/fileDescriptors/ReopenListeningAsynchronousSocketChannelTest](https://github.com/TimPushkin/crac/actions/runs/13795590141/attempts/1#user-content-jdk_crac_filedescriptors_reopenlisteningasynchronoussocketchanneltest) failed once (judging by the exit code, there was an access violation error) but it was fine after re-run, I couldn't reproduce that locally (run the test 10 times) and the change seems unrelated to the test.

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PR Comment: https://git.openjdk.org/crac/pull/211#issuecomment-2716704102