RFR: 8356329: Report compact object headers in hs_err [v3]

[Zhengyu Gu]

On Wed, 7 May 2025 19:04:51 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> We should report when UseCompactObjectHeaders is enabled in the hs_err file, just like we do for UseCompressedOops or UseCompressedClassPointers, for improved diagnostics.
>
> Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Replace 'compressed class ptrs' with 'compact obj headers' when running with +UCOH

LGTM

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Marked as reviewed by zgu (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/25080#pullrequestreview-2823258335