RFR: 8348430: Update jfr tests to allow execution with different vm flags

[Markus Grönlund]

On Thu, 30 Jan 2025 14:25:51 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

> Could I have review of a change that allows some tests to run with flags.
> 
> Thanks
> Erik

Marked as reviewed by mgronlun (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/23369#pullrequestreview-2584467279