[Automated] PRs inserted in VS build main-12211.18

[dotnet-bot]

View Complete Diff of Changes

• Remove always-on language feature flag NonVariablePatternsToRightOfAsPatterns (#20158)
• Remove always-on DotlessFloat32Literal language feature flag
• [MicroPerf] Reverse instead of sort already-ordered branch fixups in IL writer
• Fail F# tests whose return value xUnit never executes
• [MicroPerf] Eliminate closure allocations in List.mapq and List.lengthsEqAndForall2
• Improve parser error recovery for underscore-dot patterns
• Remove always-on ExtendedStringInterpolation language feature flag
• Remove always-on InterfacesWithAbstractStaticMembers feature flag
• Make List.vMapFold inline to drop the nullness-import closure
• [MicroPerf] Eliminate closure allocations in well-known-attribute queries
• Remove per-call closure allocations from post-inference type checks
• [MicroPerf] Inline the free-variable typar foldBacks
• chore(Test): Rollback precautionary serial testing
• feat(Task, Async): parallelLimit, sequential, startAsyncImmediate
• Cut allocations in the VS project options caches and drop a boxing check
• Keep final do! expressions on the Bind path
• Remove trailing whitespace from src and vsintegration/src
• Remove the ArithmeticInLiterals language feature flag
• Remove always-on ExtendedFixedBindings language feature flag
• Remove always-on language feature flag OverloadsForCustomOperations
• Avoid per-call closure allocation in type-hierarchy traversal
• Cache IL method parameter attributes during overload resolution
• Check let bindings through active patterns like a match (#16856)
• Remove trailing whitespaces from tests