Error Prone Files

This release includes several changes to Matcher APIs, and removed some deprecated or problematic APIs:

• Remove deprecated MethodMatchers.withSignature API, which relies on fragile toString behaviour. Alternatives for matching on method signatures with varargs and type parameters were added in https://github.com/google/error-prone/commit/a98a1c55d92d343ae2c142485e8888cd46aa78b3.
• Removed variableType(Matcher) API. Matchers.variableType(Matcher) uses VariableTree#getType to match variable types, which own't work for lambda parameters with inferred types after JDK-8268850. The recommended replacement is variableType(TypePredicate).
• Make enclosingPackage return an optional. Module elements are not enclosed by a package, checks using enclosingPackage shouldn't assume an enclosing package exists when processing arbitrary elements.
• New FieldMatchers API, similar to MethodMatchers (https://github.com/google/error-prone/commit/1dd9c3a6bd76fca8104be6ae1c1004655d6a1745).

New checks:

• AssertThrowsBlockToExpression: Discourage unnecessary block lambdas in assertThrows.
• AssertThrowsMinimizer: Suggest minimizing the amount of logic in assertThrows.
• MemorySegmentReferenceEquality: Discourage using reference equality for MemorySegments.
• PreferThrowsTag: Recommends using @throws instead of the legacy @exception javadoc tag.
• RecordAccessorInCompactConstructor: detect record accessors inside the compact canonical ctors, which read uninitialized fields.

Closed issues: [#2283], [#3503], [#5210], [#5289], [#5548], [#5548], [#5554], [#5609], [#5614], [#5656]

Full changelog: https://github.com/google/error-prone/compare/v2.48.0...v2.49.0