RFR: 8350753: Deprecate UseCompressedClassPointers [v2]

[Thomas Stuefe]

> Deprecates UseCompressedClassPointers. For the lengthy description of why and how we do this, please read the lengthy [CSR](https://bugs.openjdk.org/browse/JDK-8350754).
> 
> Testing:
> 
> I ran all jtreg tests manually on Linux-x64 that used the flag in some form (55 tests) to ensure they don't trip over the added deprecation output.
> 
> I also tested the JVM on arm32 to verify that UseCompressedClassPointers had never been available there, and that we don't start printing a confusing deprecation message now.

Thomas Stuefe 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 three additional commits since the last revision:

 - Merge branch 'openjdk:master' into JDK-8350753-Deprecate-UseCompressedClassPointers
 - not on 32-bit
 - Deprecate UseCompressedClassPointers

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/24436/files
  - new: https://git.openjdk.org/jdk/pull/24436/files/bb73be7d..71ee02a8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24436&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24436&range=00-01

  Stats: 12345 lines in 476 files changed: 8696 ins; 2786 del; 863 mod
  Patch: https://git.openjdk.org/jdk/pull/24436.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24436/head:pull/24436

PR: https://git.openjdk.org/jdk/pull/24436