[jdk21u] RFR: Merge jdk21u-dev:master

[Goetz Lindenmaier]

Merge changes from jdk21u-dev to jdk21u for the next build tag

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Commit messages:
 - 8353175: Eliminate double iteration of stream in FieldDescriptor reinitialization
 - 8327980: Convert javax/swing/JToggleButton/4128979/bug4128979.java applet test to main
 - 8341131: Some jdk/jfr/event/compiler tests shouldn't be executed with Xcomp
 - 8368982: Test sun/security/tools/jarsigner/EC.java completed and timed out
 - 8313770: jdk/internal/platform/docker/TestSystemMetrics.java fails on Ubuntu
 - 8368960: Adjust java UL logging in the build
 - 8369563: Gtest dll_address_to_function_and_library_name has issues with stripped pdb files
 - 8343340: Swapping checking do not work for MetricsMemoryTester failcount
 - 8369032: Add test to ensure serialized ICC_Profile stores only necessary optional data
 - 8364258: ThreadGroup constant pool serialization is not normalized

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

Changes: https://git.openjdk.org/jdk21u/pull/476/files
  Stats: 1413 lines in 32 files changed: 678 ins; 680 del; 55 mod
  Patch: https://git.openjdk.org/jdk21u/pull/476.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/476/head:pull/476

PR: https://git.openjdk.org/jdk21u/pull/476