RFR: 8356289: Shenandoah: Clean up SATB barrier runtime entry points

[Cesar Soares Lucas]

On Wed, 20 Aug 2025 20:56:01 GMT, William Kemper <wkemper at openjdk.org> wrote:

>> Looks good to me.  Have we run this change through our internal CI regression pipelines?
>
> Looks reasonable to me. I have the same question as @kdnilsen .

I reviewed the tests internally with @earthling-amzn ; He said everything looks good.

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PR Comment: https://git.openjdk.org/jdk/pull/26850#issuecomment-3215770829