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

[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.

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Commit messages:
 - 8365823: Revert storing abstract and interface Klasses to non-class metaspace
 - 8365823: Revert storing abstract and interface Klasses to non-class metaspace

Changes: https://git.openjdk.org/jdk/pull/27295/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27295&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8365823
  Stats: 85 lines in 18 files changed: 6 ins; 55 del; 24 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