RFR: 8303357: [JVMCI] thread is _thread_in_vm when committing JFR compilation event

[Doug Simon]

On Tue, 28 Feb 2023 16:23:04 GMT, Tom Rodriguez <never at openjdk.org> wrote:

>> [JDK-8280844](https://bugs.openjdk.org/browse/JDK-8280844) added a native-to-VM thread transition when committing a JFR compilation event. This is not necessary if the thread is already `_thread_in_vm` at the commit point. This PR makes the transition conditional.
>
> Marked as reviewed by never (Reviewer).

Thanks @tkrodriguez and @vnkozlov !

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PR: https://git.openjdk.org/jdk/pull/12787