RFR: 8362336: Revert changes in metaspaceShared.cpp done via JDK-8356807

[Calvin Cheung]

On Wed, 16 Jul 2025 15:30:49 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> The changes in `metaspaceShared.cpp` for JDK-8356807 is causing bootcycle prebuilt failures. Therefore, reverting those changes.
>> 
>> Testing: tiers 1 - 3, builds-tier4.
>
> Looks good and qualifies as a Trivial fix.

Thanks @iklam for the review.

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PR Comment: https://git.openjdk.org/jdk/pull/26344#issuecomment-3079275067