RFR: 8352178: Add precondition in VMThread::execute to prevent deadlock [v3]

[Thomas Schatzl]

On Tue, 18 Mar 2025 14:55:12 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Simple patch of adding `SuspendibleThreadSet` related precondition to `Handshake::execute` in order to prevent deadlock.
>> All existing callsites satisfy this precondition already.
>> 
>> Test: tier1-5
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Marked as reviewed by tschatzl (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/24088#pullrequestreview-2698710505