RFR: 8365823: Revert storing abstract and interface Klasses to non-class metaspace [v4]

[Coleen Phillimore]

> This change removes the optimization to not store abstract and interface Klass metadata to non-class metaspace.  Now all Klass metadata is in the Klass metaspace.  This is simpler and less bug prone, and didn't help with the limitation of classes that can be stored in class metaspace materially.
> Tested with tier1-4.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Revert JFR changes from JDK-8338526 also.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27295/files
  - new: https://git.openjdk.org/jdk/pull/27295/files/fe44431f..c333b8a1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27295&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27295&range=02-03

  Stats: 8 lines in 1 file changed: 1 ins; 2 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/27295.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27295/head:pull/27295

PR: https://git.openjdk.org/jdk/pull/27295