RFR: 8366475: Rename MetaspaceShared class to AOTMetaspace [v3]

[Vladimir Kozlov]

On Sat, 30 Aug 2025 18:17:42 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> This PR is one (of many) steps in [JDK-8366473](https://bugs.openjdk.org/browse/JDK-8366473) (Refactor CDS source code with new AOT terminology):
>> 
>> Rename this class to with a naming convention that's consistent with other new AOT classes such as AOTClassLinker.
>> 
>> All changes are mechanical text replacement. Headers are resorted alphabetically.
>
> Ioi Lam has updated the pull request incrementally with one additional commit since the last revision:
> 
>   removed unnecessary includes

Good.

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Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27017#pullrequestreview-3171201064