New upstream version 2.15.0

.github/workflows/release.yml

annotation/pom.xml

annotations/pom.xml

...om/google/errorprone/annotations/CompileTimeConstant.java

check_api/pom.xml

...ain/java/com/google/errorprone/RefactoringCollection.java

...ava/com/google/errorprone/apply/DescriptionBasedDiff.java

...ain/java/com/google/errorprone/apply/ImportOrganizer.java

...src/main/java/com/google/errorprone/apply/SourceFile.java

.../java/com/google/errorprone/dataflow/AccessPathStore.java

...flow/nullnesspropagation/NullnessPropagationTransfer.java

...a/com/google/errorprone/fixes/BranchedSuggestedFixes.java

...c/main/java/com/google/errorprone/fixes/Replacements.java

...c/main/java/com/google/errorprone/fixes/SuggestedFix.java

...main/java/com/google/errorprone/fixes/SuggestedFixes.java

...main/java/com/google/errorprone/matchers/Description.java

...in/java/com/google/errorprone/matchers/JUnitMatchers.java

...n/java/com/google/errorprone/matchers/TestNgMatchers.java

.../src/main/java/com/google/errorprone/util/ASTHelpers.java

...i/src/main/java/com/google/errorprone/util/Commented.java