[crac] RFR: Make CheckpointException/RestoreException aggregate-only [v8]

[Anton Kozlov]

On Thu, 8 Jun 2023 11:50:31 GMT, Radim Vansa <duke at openjdk.org> wrote:

>> CheckpointException and RestoreException (both jdk.crac and javax.crac) cannot carry any message, cause and don't collect stack trace. The sole purpose of these is to aggregate other exceptions in suppressed exceptions.
>
> Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update javadoc, make final

Thank you! LGTM

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Marked as reviewed by akozlov (Lead).

PR Review: https://git.openjdk.org/crac/pull/64#pullrequestreview-1470338238