[jdk11u-dev] RFR: 8293563: [macos-aarch64] SA core file tests failing with sun.jvm.hotspot.oops.UnknownOopException

[Christoph Langer]

The backport of [JDK-8248194](https://bugs.openjdk.org/browse/JDK-8248194) introduced the testing of core files in test/hotspot/jtreg/serviceability/sa/ClhsdbFindPC.java. This can cause issues which we are seeing on MacOS arm64. With this backport, these seem to be gone.

The fix does not exactly fit into the 11u-dev codebase, so I had to make several adpatations.

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Commit messages:
 - 8293563: [macos-aarch64] SA core file tests failing with sun.jvm.hotspot.oops.UnknownOopException

Changes: https://git.openjdk.org/jdk11u-dev/pull/2698/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2698&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293563
  Stats: 23 lines in 6 files changed: 14 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2698.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2698/head:pull/2698

PR: https://git.openjdk.org/jdk11u-dev/pull/2698