RFR: Merge openjdk/jdk:master

[William Kemper]

Merges tag jdk-24+7

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Commit messages:
 - 8336587: failure_handler lldb command times out on macosx-aarch64 core file
 - 8336091: Fix HTML warnings in the generated HTML files
 - 8335921: Fix HotSpot VM build without JVMTI
 - 8336300: DateFormatSymbols#getInstanceRef returns non-cached instance
 - 8336638: Parallel: Remove redundant mangle in PSScavenge::invoke
 - 8299080: Wrong default value of snippet lang attribute
 - 8334217: [AIX] Misleading error messages after JDK-8320005
 - 8334781: JFR crash:  assert(((((JfrTraceIdBits::load(klass)) & ((JfrTraceIdEpoch::this_epoch_method_and_class_bits()))) != 0))) failed: invariant
 - 8334502: gtest/GTestWrapper.java fails on armhf due to LogDecorations.iso8601_utctime_test
 - 8336040: Missing closing anchor element in Docs.gmk
 - ... and 452 more: https://git.openjdk.org/shenandoah/compare/d8af5894...21a6cf84

The webrev contains the conflicts with master:
 - merge conflicts: https://webrevs.openjdk.org/?repo=shenandoah&pr=461&range=00.conflicts

Changes: https://git.openjdk.org/shenandoah/pull/461/files
  Stats: 71971 lines in 1877 files changed: 44597 ins; 19166 del; 8208 mod
  Patch: https://git.openjdk.org/shenandoah/pull/461.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/461/head:pull/461

PR: https://git.openjdk.org/shenandoah/pull/461