Error Prone 2.46.0

Changes:

• The javac flag -XDaddTypeAnnotationsToSymbol=true is now required for Error Prone invocations on JDK 21, to enable the javac fix for JDK-8225377: type annotations are not visible to javac plugins across compilation boundaries. See #5426 for details.
• Remove deprecated value attribute from @IncompatibleModifiers and @RequiredModifiers (#2122)
• Error Prone API changes to encapsulate references to internal javac APIs for end position handling (EndPosTable, DiagnosticPosition) (5440bb4, 06c2905, f3915ec)

New checks:

• DuplicateAssertion: detect duplicated assertion lines where the argument to assertThat is pure
• IfChainToSwitch: suggest converting chains of if-statements into arrow switches
• ScannerUseDelimiter: discourage Scanner.useDelimiter("\\A")
• AddNullMarkedToClass: refactoring to add @NullMarked annotation to top level classes