RFR: 8362532: Test gc/g1/plab/* duplicate command-line options [v2]

[Albert Mingkun Yang]

On Mon, 21 Jul 2025 08:29:19 GMT, Lei Zhu <duke at openjdk.org> wrote:

>> Just removed duplicate flag, no other changes.
>
> Lei Zhu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update full name

Marked as reviewed by ayang (Reviewer).

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

PR Review: https://git.openjdk.org/jdk/pull/26402#pullrequestreview-3037334673