[jdk25u-dev] RFR: 8359707: Add classfile modification code to RedefineClassHelper

[Aleksey Shipilev]

[CODETOOLS-7904109](https://bugs.openjdk.org/browse/CODETOOLS-7904109) shows there is apparently a jtreg 8.0 bug, which manifests as intermittent failure in this test. Luckily, mainline have already done the patch that does not step on this bug. This is also why we only see it in 25u now: mainline did the patch first, then upgraded the jtreg, so it got saved by accident :)

Additional testing:
 - [x] MacOS AArch64 server fastdebug, 100x, affected test fails intermittently before the patch, passes with it

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Commit messages:
 - Backport e7a450038a47a76d2e616ebce2a7fa8a51e36ea4

Changes: https://git.openjdk.org/jdk25u-dev/pull/94/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=94&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8359707
  Stats: 91 lines in 2 files changed: 44 ins; 43 del; 4 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/94.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/94/head:pull/94

PR: https://git.openjdk.org/jdk25u-dev/pull/94