RFR: 8316694: Implement relocation of nmethod within CodeCache [v5]

[Chad Rakoczy]

> This PR introduces a new function to replace nmethods, addressing [JDK-8316694](https://bugs.openjdk.org/browse/JDK-8316694). It enables the creation of new nmethods from existing ones, allowing method relocation in the code heap and supporting [JDK-8328186](https://bugs.openjdk.org/browse/JDK-8328186).
> 
> When an nmethod is replaced, a deep copy is performed. The corresponding Java method is updated to reference the new nmethod, while the old one is marked as unused. The garbage collector handles final cleanup and deallocation.
> 
> This change does not modify existing code paths and therefore does not benefit much from existing tests. New tests were created and confirmed to pass on x64/aarch64 for slowdebug/fastdebug/release.

Chad Rakoczy has updated the pull request incrementally with six additional commits since the last revision:

 - Cast dest to void star
 - Update tests
 - Immutable data references updates
 - Remove current code heap check
 - Remove old copy constructor from header file
 - Remove relocate all

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/23573/files
  - new: https://git.openjdk.org/jdk/pull/23573/files/7b448c6c..8f12fd3d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23573&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23573&range=03-04

  Stats: 398 lines in 9 files changed: 83 ins; 276 del; 39 mod
  Patch: https://git.openjdk.org/jdk/pull/23573.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23573/head:pull/23573

PR: https://git.openjdk.org/jdk/pull/23573