Integrated: Merge lworld

[Vicente Romero]

Merge branch 'lworld' into lw5_merge_lworld
# Conflicts:
#	src/jdk.compiler/share/classes/com/sun/tools/javac/code/Preview.java
#	src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java
#	src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java
#	src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Check.java
#	src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Flow.java
#	src/jdk.compiler/share/classes/com/sun/tools/javac/comp/TypeEnter.java
#	src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java
#	src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties
#	src/jdk.jdeps/share/classes/com/sun/tools/classfile/AccessFlags.java
#	src/jdk.jdeps/share/classes/com/sun/tools/classfile/Attribute.java
#	src/jdk.jdeps/share/classes/com/sun/tools/classfile/ClassWriter.java
#	src/jdk.jpackage/share/classes/jdk/jpackage/internal/util/function/ImplicitCreation_attribute.java
#	src/jdk.jpackage/share/classes/jdk/jpackage/internal/util/function/NullRestricted_attribute.java
#	test/langtools/tools/javac/valhalla/value-objects/ValueObjectCompilationTests.java

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

Commit messages:
 - Merge branch 'lworld' into lw5_merge_lworld
 - 8347754: [lw5] fix the order of nullness markers in signatures
 - Merge lworld
 - Merge lworld
 - Merge lworld
 - Merge lworld
 - Merge lworld
 - 8340125: [lw5] null checks are not being generated for method invocations and array writes
 - Merge lworld
 - 8340027: [lw5] the ACC_STRICT flag is not being set for non-nullable static fields
 - ... and 56 more: https://git.openjdk.org/valhalla/compare/be146831...15a5f0ee

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

Changes: https://git.openjdk.org/valhalla/pull/1479/files
  Stats: 6799 lines in 101 files changed: 6673 ins; 5 del; 121 mod
  Patch: https://git.openjdk.org/valhalla/pull/1479.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1479/head:pull/1479

PR: https://git.openjdk.org/valhalla/pull/1479