RFR: ThreadSnapshot: redesign and cleanup [v3]

[duke]

On Sat, 17 May 2025 00:24:21 GMT, Alex Menkov <amenkov at openjdk.org> wrote:

>> ThreadSnapshot: redesign and cleanup
>
> Alex Menkov has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - jcheck
>  - update

@alexmenkov 
Your change (at version 692bdb23b3d5075f69527134444879006bd8c50c) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/loom/pull/220#issuecomment-2891853959