RFR: 8345169: Implement JEP 503: Remove the 32-bit x86 Port [v2]

[Aleksey Shipilev]

> This PR implements JEP 503: Remove the 32-bit x86 Port.
> 
> The JEP is proposed to target 25, we would not integrate until JEP is ready. Reviews are appreciated meanwhile.
> 
> This is only the removal of obvious 32-bit x86 parts, mostly files with `x86_32` in their name.  Those are only built when build system knows we are compiling for x86_32. There is therefore no impact on x86_64. The approach for removing x86_32 files only also makes this PR borderline trivial, and requires no additional testing beyond normal pre-integration checks.
> 
> The rest of the code is quite heavily intertwined with x86_64 and/or Zero, and would require accurate untangling. It would be much easier to review and test once we purge the free-standing parts of 32-bit x86 port, which is also a bulk of the port. The tangling with 32-bit x86 Zero is also why I did not touch most of the build system paths that handle x86. There is [JDK-8351148](https://bugs.openjdk.org/browse/JDK-8351148) umbrella that tracks further cleanup work. One can peek the final state that can be reached with all the cleanups in my earlier exploratory https://github.com/openjdk/jdk/pull/22567.
> 
> Additional testing:
>  - [x] Linux x86_32 Server fastdebug, `make bootcycle-images` (now fails configure)
>  - [x] Linux x86_64 Server fastdebug, `make bootcycle-images` (still works)
>  - [x] Linux x86_32 Zero fastdebug, `make bootcycle-images` (still works)
>  - [x] Linux x86_64 Zero fastdebug, `make bootcycle-images` (still works)

Aleksey Shipilev 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:

 - Drop commented out block from deprecations
 - Merge branch 'master' into JDK-8345169-32bit-x86-be-gone
 - Generic 32-bit x86 configure error supercedes Windows 32-bit x86
 - 8345169: Implement JEP 503: Remove the 32-bit x86 Port

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/23906/files
  - new: https://git.openjdk.org/jdk/pull/23906/files/b76816cb..0fef97b8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23906&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23906&range=00-01

  Stats: 7320 lines in 306 files changed: 3971 ins; 1797 del; 1552 mod
  Patch: https://git.openjdk.org/jdk/pull/23906.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23906/head:pull/23906

PR: https://git.openjdk.org/jdk/pull/23906