RFR: 8339939: [JVMCI] Don't compress abstract and interface Klasses [v2]

[Yudi Zheng]

> https://github.com/openjdk/jdk/pull/19157 disallows storing abstract and interface Klasses in class metaspace. JVMCI has to respect this and avoids compressing abstract and interface Klasses

Yudi Zheng has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - address comments.
 - Merge master
 - trim trailing whitespace
 - make JVMCI aware that some klass pointers are not compressible

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20949/files
  - new: https://git.openjdk.org/jdk/pull/20949/files/712272bb..92001a87

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20949&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20949&range=00-01

  Stats: 230149 lines in 1914 files changed: 207890 ins; 11763 del; 10496 mod
  Patch: https://git.openjdk.org/jdk/pull/20949.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20949/head:pull/20949

PR: https://git.openjdk.org/jdk/pull/20949