RFR: Export JavaThread::_lock_id, ObjectMonitor::_stack_locker and markWord::marked_value.

[duke]

On Mon, 22 Jul 2024 16:00:00 GMT, Yudi Zheng <yzheng at openjdk.org> wrote:

> Essential exports for implementing fibers support in Graal.

@mur47x111 
Your change (at version 0b808fc35d3db7cc9b2cf868a647cc90165067fb) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/loom/pull/211#issuecomment-2247440090