RFR: 8329491: GetThreadListStackTraces function should use JvmtiHandshake [v3]

[Serguei Spitsyn]

On Wed, 10 Apr 2024 03:17:32 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> The internal JVM TI `JvmtiHandshake` and `JvmtiUnitedHandshakeClosure` classes were introduced in the JDK 22 to unify/simplify the JVM TI functions supporting implementation of the virtual threads. This enhancement is to refactor the JVM TI function `GetThreadListStackTraces` on the base of `JvmtiHandshake` and `JvmtiUnitedHandshakeClosure` classes.
>> 
>> Testing:
>>  - Ran mach5 tiers 1-6
>
> Serguei Spitsyn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review: add some asserts

Leonid, thank you for review!

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PR Comment: https://git.openjdk.org/jdk/pull/18574#issuecomment-2048377357