[Hexagon] Add XRay custom and typed event support (#191749) Add support for XRay custom events (llvm.xray.customevent) and typed events (llvm.xray.typedevent) for Hexagon. LLVM: * Add Hexagon to the architecture gate in SelectionDAGBuilder for xray_customevent and xray_typedevent intrinsic lowering * Implement EmitInstrWithCustomInserter for PATCHABLE_EVENT_CALL and PATCHABLE_TYPED_EVENT_CALL pseudo instructions * Implement LowerPATCHABLE_EVENT_CALL in HexagonAsmPrinter that emits inline sleds with jump-over, allocframe/deallocframe for LR:FP save, argument register save/restore, and call to the event handler * Add event pseudo dispatch in HexagonMCInstLower * Prevent event pseudos from being packetized (solo instructions) compiler-rt: * Implement patchCustomEvent and patchTypedEvent in xray_hexagon.cpp to patch the sled jump to nop (enable) or back (disable) * Add __xray_CustomEvent and __xray_TypedEvent trampolines in the Hexagon XRay trampoline assembly
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