RFR: 8349684: Remove SA core file tests from problem list for macosx-x64

[Chris Plummer]

Now that we have retired OSX 11 and earlier, [JDK-8267433](https://bugs.openjdk.org/browse/JDK-8267433) does not seem to reproduce anymore. I ran the SA core file tests about 2000 times and only saw 1 failure, and it was not related to [JDK-8267433](https://bugs.openjdk.org/browse/JDK-8267433). I think this is acceptable and we should make SA core file tests on macosx-x64 part of our CI testing again and see how they do.

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Commit messages:
 - Remove SA core files tests from problem list for macosx-x64

Changes: https://git.openjdk.org/jdk/pull/23529/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23529&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349684
  Stats: 7 lines in 1 file changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/23529.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23529/head:pull/23529

PR: https://git.openjdk.org/jdk/pull/23529