[lworld] RFR: Merge jdk

[David Simms]

Merge tag 'jdk-20+18' into lworld_merge_jdk_20_18
Added tag jdk-20+18 for changeset 0ec18382b

# Conflicts:
#	src/hotspot/share/ci/ciSignature.cpp
#	src/hotspot/share/opto/callnode.cpp
#	src/hotspot/share/opto/callnode.hpp
#	src/hotspot/share/opto/graphKit.cpp
#	src/hotspot/share/opto/memnode.cpp
#	src/hotspot/share/runtime/sharedRuntime.cpp
#	src/java.base/share/classes/jdk/internal/reflect/MethodAccessorGenerator.java

-------------

Commit messages:
 - (JDK-8295066) Revert "8242115: C2 SATB barriers are not safepoint-safe"
 - Trailing whitespace
 - Merge branch 'lworld' into lworld_merge_jdk_20_18
 - Merge tag 'jdk-20+18' into lworld_merge_jdk_20_18
 - 8294869: Correct failure of RemovedJDKInternals.java after JDK-8294618
 - 8294397: Replace StringBuffer with StringBuilder within java.text
 - 8294734: Redundant override in AES implementation
 - 8294618: Update openjdk.java.net => openjdk.org
 - 8294840: langtools OptionalDependencyTest.java use File.pathSeparator
 - 8289925: Shared code shouldn't reference the platform specific method frame::interpreter_frame_last_sp()
 - ... and 97 more: https://git.openjdk.org/valhalla/compare/7c569cd2...36781877

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.org/?repo=valhalla&pr=784&range=00.0
 - jdk: https://webrevs.openjdk.org/?repo=valhalla&pr=784&range=00.1

Changes: https://git.openjdk.org/valhalla/pull/784/files
  Stats: 12855 lines in 388 files changed: 7926 ins; 3377 del; 1552 mod
  Patch: https://git.openjdk.org/valhalla/pull/784.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/784/head:pull/784

PR: https://git.openjdk.org/valhalla/pull/784