RFR: 8365262: [IR-Framework] Add simple way to add cross-product of flags [v5]

[Manuel Hässig]

On Fri, 22 Aug 2025 06:55:38 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Manuel Hässig has updated the pull request incrementally with three additional commits since the last revision:
>> 
>>  - Fix test
>>  - Better counting in tests
>>  - post processing of flags and documentation
>
> Looks much better already! I now took a closer look at the implementation :)

Thank you for your detailed review, @eme64. I addressed all of your comments.

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PR Comment: https://git.openjdk.org/jdk/pull/26762#issuecomment-3213728001