RFR: 8308463: Refactor regenerated class handling in lambdaFormInvokers.cpp

[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.

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Commit messages:
 - 8308463: Refactor regenerated class handling in lambdaFormInvokers.cpp

Changes: https://git.openjdk.org/jdk/pull/14573/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14573&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308463
  Stats: 202 lines in 7 files changed: 174 ins; 22 del; 6 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