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

[Ioi Lam]

On Wed, 16 Jul 2025 06:26:48 GMT, Calvin Cheung <ccheung 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.

-------------

Marked as reviewed by iklam (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26344#pullrequestreview-3025602592