RFR: Merge openjdk/jdk21u-dev:master

[William Kemper]

Merges tag jdk-21.0.4+5

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Commit messages:
 - 8320692: Null icon returned for .exe without custom icon
 - 8330275: Crash in XMark::follow_array
 - 8329862: libjli GetApplicationHome cleanups and enhance jli tracing
 - 8323635: Test gc/g1/TestHumongousAllocConcurrentStart.java fails with -XX:TieredStopAtLevel=3
 - 8295111: dpkg appears to have problems resolving symbolically linked native libraries
 - 8331031: unify os::dont_yield and os::naked_yield across Posix platforms
 - 8329223: Parallel: Parallel GC resizes heap even if -Xms = -Xmx
 - 8330464: hserr generic events - add entry for the before_exit calls
 - 8329605: hs errfile generic events - move memory protections and nmethod flushes to separate sections
 - 8321812: Update GC tests to use execute[Limited]TestJava
 - ... and 7 more: https://git.openjdk.org/shenandoah-jdk21u/compare/c44d4e93...2971cb57

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/52/files
  Stats: 1246 lines in 155 files changed: 442 ins; 338 del; 466 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/52.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/52/head:pull/52

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/52