RFR: 8319540: GC: Make TestSelectDefaultGC use createTestJavaProcessBuilder

[Stefan Karlsson]

On Thu, 20 Nov 2025 11:02:35 GMT, Ramkumar Sunderbabu <rsunderbabu at openjdk.org> wrote:

> Make TestSelectDefaultGC forward VM/JAVA_OPTIONS.
> 
> Testing:
> Tiers 1 to 5
> Ran with all flag combinations in CI

Marked as reviewed by stefank (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/28422#pullrequestreview-3514115990