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

[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)

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

Commit messages:
 - Generic 32-bit x86 configure error supercedes Windows 32-bit x86
 - 8345169: Implement JEP 503: Remove the 32-bit x86 Port

Changes: https://git.openjdk.org/jdk/pull/23906/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23906&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345169
  Stats: 30068 lines in 26 files changed: 4 ins; 30054 del; 10 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