[clang][hlsl][dxil][spirv][x86] Add tan intrinsic

[farzonl]

This change is an implementation of #87367's investigation on supporting IEEE math operations as intrinsics.
Which was discussed in this RFC:
https://discourse.llvm.org/t/rfc-all-the-math-intrinsics/78294

All the X86ISelLowering portions of this pr and tests should be credited to
https://github.com/junaire
https://reviews.llvm.org/D146905

Changes:

• clang/docs/LanguageExtensions.rst - Document the new elementwise tan builtin.
• clang/include/clang/Basic/Builtins.td - Implement the tan builtin.
• clang/lib/CodeGen/CGBuiltin.cpp - invoke the tan intrinsic on uses of the builtin
• clang/lib/Headers/hlsl/hlsl_intrinsics.h - Associate the tan builtin with the equivalent hlsl apis
• clang/lib/Sema/SemaChecking.cpp - Add generic sema checks as well as HLSL specifc sema checks to the tan builtin
• llvm/docs/GlobalISel/GenericOpcode.rst - Document the G_FTAN opcode
• llvm/docs/LangRef.rst - Document the tan intrinsic
• llvm/include/llvm/Analysis/VecFuncs.def - Associate the tan intrinsic as a vector function similar to the tanf libcall.
• llvm/include/llvm/CodeGen/BasicTTIImpl.h - Map the tan intrinsic to ISD::FTAN
• llvm/include/llvm/CodeGen/ISDOpcodes.h - Define ISD opcodes for FTAN and STRICT_FTAN
• llvm/include/llvm/IR/Intrinsics.td - Create the tan intrinsic
• llvm/include/llvm/IR/RuntimeLibcalls.def - Define tan libcall mappings
• llvm/include/llvm/Target/GenericOpcodes.td - Define the G_FTAN Opcode
• llvm/include/llvm/Support/TargetOpcodes.def - Create a G_FTAN Opcode handler
• llvm/include/llvm/Target/GlobalISel/SelectionDAGCompat.td - Map G_FTAN to ftan
• llvm/include/llvm/Target/TargetSelectionDAG.td - Define ftan, strict_ftan, and any_ftan and map them to the ISD opcodes for FTAN and STRICT_FTAN
• llvm/lib/Analysis/VectorUtils.cpp - Associate the tan intrinsic as a vector intrinsic
• llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp Map the tan intrinsic to G_FTAN Opcode
• llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp - Add G_FTAN to the list of floating point math operations also associate G_FTAN with the TAN_F runtime lib.
• llvm/lib/CodeGen/GlobalISel/Utils.cpp - More floating point math operation common behaviors.
• llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp - List the function expansion operations for FTAN and STRICT_FTAN. Also define both opcodes in PromoteNode.
• llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp - More FTAN and STRICT_FTAN handling in the legalizer
• llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h - Define SoftenFloatRes_FTAN and ExpandFloatRes_FTAN.
• llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp - Define FTAN as a legal vector operation.
• llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp - Define FTAN as a legal vector operation.
• llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp - define tan as an intrinsic that doesn't return NaN.
• llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp Map LibFunc_tan, LibFunc_tanf, and LibFunc_tanl to ISD::FTAN. Map Intrinsic::tan to ISD::FTAN and add selection dag handling for Intrinsic::tan.
• llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp - Define ftan and strict_ftan names for the equivalent ISD opcodes.
• llvm/lib/CodeGen/TargetLoweringBase.cpp -Define a Tan128 libcall and ISD::FTAN as a target lowering action.
• llvm/lib/Target/DirectX/DXIL.td - Map int_tan (the tan intrinsic) to the equivalent DXIL Op.
• llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp - Map the G_FTAN opcode to the GLSL 4.5 and openCL tan instructions.
• llvm/lib/Target/SPIRV/SPIRVLegalizerInfo.cpp - Define G_FTAN as a legal spirv target opcode.
• llvm/lib/Target/X86/X86ISelLowering.cpp - Add x86_64 lowering for tan intrinsic

closes #70082

This change might also resolve #34950