RFR: 8287520: Shrink x86_32 problemlists after JDK-8287437

[Aleksey Shipilev]

[JDK-8287137](https://bugs.openjdk.java.net/browse/JDK-8287137) added a bunch of tests into problemlist. Those lists basically exclude every test that runs with --enable-preview. [JDK-8287437](https://bugs.openjdk.java.net/browse/JDK-8287437) makes it better: it only disables Loom parts, even with --enable-preview. This allows testing x86_32 on other preview features and avoids accidental bug slippage in non-Loom code paths. We can and should shrink the problem lists now.

Additional testing:
 - [x] Removed tests with Linux x86_32 fastdebug; mostly pass, some non-Loom failures
 - [ ] Linux x86_32 fastdebug `tier1`
 - [ ] Linux x86_32 fastdebug `tier2`
 - [ ] Linux x86_32 fastdebug `tier3`
 - [ ] GHA run

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

Commit messages:
 - Keep GetEventWriter on problemlist
 - Fix

Changes: https://git.openjdk.java.net/jdk/pull/8946/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8946&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8287520
  Stats: 143 lines in 3 files changed: 0 ins; 142 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8946.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8946/head:pull/8946

PR: https://git.openjdk.java.net/jdk/pull/8946