RFR: 8359707: Add classfile modification code to RedefineClassHelper [v8]

[Leonid Mesnik]

On Fri, 27 Jun 2025 11:37:30 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> I copied this code for another test in the Valhalla repo and thought it would be a good utility function.  It might be better written using the Classfile API.
>> Tested with test.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Rename replaceAllStrings to replaceClassName and add back the byte buffer version of the function.

Marked as reviewed by lmesnik (Reviewer).

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

PR Review: https://git.openjdk.org/jdk/pull/25857#pullrequestreview-2967240011