RFR: 8308463: Refactor regenerated class handling in lambdaFormInvokers.cpp [v3]

[Ioi Lam]

> The handling of regenerated classes need to be refactored to enable future development:
> 
> - Improve the API to access the regenerated classes and their methods
> - Allow more classes to be regenerated, not just the Lambda Form invokers. Therefore, the code is moved to a new file cds/regeneratedClasses.cpp
> 
> 
> Please see the bug report [JDK-8308463](https://bugs.openjdk.org/browse/JDK-8308463) for motivation of this PR.

Ioi Lam has updated the pull request incrementally with two additional commits since the last revision:

 - changed log to warning
 - @coleenp comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14573/files
  - new: https://git.openjdk.org/jdk/pull/14573/files/9a22a85a..aaae0a57

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14573&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14573&range=01-02

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/14573.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14573/head:pull/14573

PR: https://git.openjdk.org/jdk/pull/14573