[CIR] Add support for `pslldqi`

[wizardengineer]

Currently we're just doing:

clangir/clang/lib/CIR/CodeGen/CIRGenBuiltinX86.cpp

Lines 1119 to 1122 in 3d04a3d

	case X86::BI__builtin_ia32_pslldqi128_byteshift:
	case X86::BI__builtin_ia32_pslldqi256_byteshift:
	case X86::BI__builtin_ia32_pslldqi512_byteshift:
	llvm_unreachable("pslldqi NYI");