RFR: 8343218: Disable allocating interface and abstract classes in non-class metaspace

[Coleen Phillimore]

Change the code to allocate all Klasses to class-metaspace until c2 dependencies are understood and fixed, and more urgent need arises when compressing klass pointers to smaller numbers of bits.
Tested with tier1-4.

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Commit messages:
 - 8343218: Disable allocating interface and abstract classes in non-class metaspace

Changes: https://git.openjdk.org/jdk/pull/21769/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21769&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8343218
  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21769.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21769/head:pull/21769

PR: https://git.openjdk.org/jdk/pull/21769