[SPIRV] Add trig function lowering (#95973) This change is part of this proposal: https://discourse.llvm.org/t/rfc-all-the-math-intrinsics/78294 This is part 2 of 4 PRs. It sets the ground work for adding the intrinsics. Add SPIRV Lower for `acos`, `asin`, `atan`, `cosh`, `sinh`, and `tanh` https://github.com/llvm/llvm-project/issues/70079 https://github.com/llvm/llvm-project/issues/70080 https://github.com/llvm/llvm-project/issues/70081 https://github.com/llvm/llvm-project/issues/70083 https://github.com/llvm/llvm-project/issues/70084 https://github.com/llvm/llvm-project/issues/95966 There isn't any aarch64 change in this pr, but when you add a target opcode it is visible in there validaiton tests.
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