RFR: 8373876: StackWalkNativeToJava print more output in case of failures [v3]

[David Holmes]

On Fri, 19 Dec 2025 13:28:37 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> In case of failures the jtreg test StackWalkNativeToJava sometimes misses to print the 'bad' output we check. This makes analyzing errors hard, so better enhance the output .
>> The other checks ` output.shouldNotContain`   print already the diagnostic summary of output.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Follow Davids suggestion; change other test method too

Marked as reviewed by dholmes (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/28871#pullrequestreview-3602011452