RFR: Merge openjdk/jdk:master

[William Kemper]

This merges tag jdk-21+3

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Commit messages:
 - Use new constant for two operand lir form
 - Merge tag 'jdk-21+3' into merge-jdk-21-3
 - 8299061: Using lambda to optimize GraphKit::compute_stack_effects()
 - 8269736: Optimize CDS PatchEmbeddedPointers::do_bit()
 - 8297724: Loop strip mining prevents some empty loops from being eliminated
 - 8299015: Ensure that HttpResponse.BodySubscribers.ofFile writes all bytes
 - 8296275: Write a test to verify setAccelerator method of JMenuItem
 - 8297682: Use Collections.emptyIterator where applicable
 - 8299025: BMPImageReader.java readColorPalette could use staggeredReadByteStream
 - 8299146: No copyright statement on ArtifactResolverException.java
 - ... and 100 more: https://git.openjdk.org/shenandoah/compare/6c8fa0f7...1acda05b

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.org/?repo=shenandoah&pr=189&range=00.0
 - openjdk/jdk:master: https://webrevs.openjdk.org/?repo=shenandoah&pr=189&range=00.1

Changes: https://git.openjdk.org/shenandoah/pull/189/files
  Stats: 7642 lines in 349 files changed: 4348 ins; 1449 del; 1845 mod
  Patch: https://git.openjdk.org/shenandoah/pull/189.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah pull/189/head:pull/189

PR: https://git.openjdk.org/shenandoah/pull/189