RFR: 8367982: Unify ObjectSynchronizer and LightweightSynchronizer [v2]

[Coleen Phillimore]

On Mon, 27 Oct 2025 00:12:41 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Since we are currently investigating the OM table elseware (see: [JDK-8365493](https://bugs.openjdk.org/browse/JDK-8365493)) I wote for not doing any OM table refactoring in this PR.
>
> I agree on both counts: move it to a new file in a new PR.

Follow-on cleanup would be fine for moving this.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27915#discussion_r2465532873