RFR: 8365726: Test crashed with assert in C1 thread: Possible safepoint reached by thread that does not allow it

[Dean Long]

On Wed, 27 Aug 2025 17:04:27 GMT, Igor Veresov <iveresov at openjdk.org> wrote:

> `TrainingData_lock` guards a non-thread safe container and is only locked for a short time. Allow it to skip the safepoint check.

Marked as reviewed by dlong (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/26964#pullrequestreview-3161558071