[jdk25u] RFR: 8358340: Support CDS heap archive with Generational Shenandoah

[Aleksey Shipilev]

On Mon, 29 Sep 2025 07:12:06 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Enables AOT/CDS caches with Generational Shenandoah.
> 
> Additional testing:
>  - [x] Linux x86_64 server fastdebug, `runtime/cds` with Generational Shenandoah
>  - [x] Linux x86_64 server fastdebug, `all` with Shenandoah
>  - [x] Linux x86_64 server fastdebug, `all` with Generational Shenandoah

Push approval granted.

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PR Comment: https://git.openjdk.org/jdk25u/pull/248#issuecomment-3352915289