RFR: 8298614: Support CDS heap dumping for SerialGC and ParallelGC [v3]

[David Holmes]

On Wed, 18 Sep 2024 17:42:44 GMT, Matias Saavedra Silva <matsaave at openjdk.org> wrote:

>> This patch upstreams [JDK-8333222](https://bugs.openjdk.org/browse/JDK-8333222) from the Leyden repo to support Serial and Parallel GC for CDS. Additional test fixes not in that patch were added. Verified with tier 1-5 tests.
>
> Matias Saavedra Silva has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Change require flagless to require G1

Marked as reviewed by dholmes (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/21004#pullrequestreview-2314262463