Integrated: Merge lworld

[Vicente Romero]

Merge branch 'lworld' into lw5_merge_lworld
# Conflicts:
#	test/langtools/lib/annotations/annotations/classfile/ClassfileInspector.java

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Commit messages:
 - Merge branch 'lworld' into lw5_merge_lworld
 - 8316742: [lworld] Intrinsify Unsafe::isFlattenedArray()
 - 8317658: [lworld] TemplateTable::withfield() does not correctly load the ResolvedFieldEntry
 - Merge jdk
 - 8311943: Cleanup usages of toLowerCase() and toUpperCase() in java.base
 - 8313765: Invalid CEN header (invalid zip64 extra data field size)
 - 8310275: Bug in assignment operator of ReservedMemoryRegion
 - 8314144: gc/g1/ihop/TestIHOPStatic.java fails due to extra concurrent mark with -Xcomp
 - 8314209: Wrong @since tag for RandomGenerator::equiDoubles
 - 8314211: Add NativeLibraryUnload event
 - ... and 150 more: https://git.openjdk.org/valhalla/compare/8a098a88...9d963e2a

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lw5: https://webrevs.openjdk.org/?repo=valhalla&pr=941&range=00.0
 - lworld: https://webrevs.openjdk.org/?repo=valhalla&pr=941&range=00.1

Changes: https://git.openjdk.org/valhalla/pull/941/files
  Stats: 22500 lines in 939 files changed: 10735 ins; 4761 del; 7004 mod
  Patch: https://git.openjdk.org/valhalla/pull/941.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/941/head:pull/941

PR: https://git.openjdk.org/valhalla/pull/941