RFR: Merge lworld

[David Simms]

Merge lworld at tag jdk-16+21

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Commit messages:
 - Merge branch 'lworld' into type-restrictions_merge_jdk_16_21
 - 8255130: [lworld] Adjust github actions
 - Merge jdk
 - 8255040: Replace __sync_add_and_fetch with __atomic_add_fetch to avoid build errors with clang
 - 8199054: Test javax/swing/UIDefaults/8149879/InternalResourceBundle.java is unstable
 - 8167355: [macos 10.12] Timeout in javax/swing/JTextArea/TextViewOOM/TextViewOOM.java
 - 8254370: Update the classes in the java.awt.color package
 - 8255206: [macos] LicenseTest fails on macOS 11
 - 8238263: Create at-requires mechanism for containers
 - 8251994: VM crashed running TestComplexAddrExpr.java test with -XX:UseAVX=X
 - ... and 186 more: https://git.openjdk.java.net/valhalla/compare/5194e6c1...19feeda2

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - type-restrictions: https://webrevs.openjdk.java.net/?repo=valhalla&pr=243&range=00.0
 - lworld: https://webrevs.openjdk.java.net/?repo=valhalla&pr=243&range=00.1

Changes: https://git.openjdk.java.net/valhalla/pull/243/files
  Stats: 69016 lines in 973 files changed: 51651 ins; 13165 del; 4200 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/243.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/243/head:pull/243

PR: https://git.openjdk.java.net/valhalla/pull/243