[clang] [llvm] [NFC][HLSL] Move emitter out of AMDGPU.cpp (PR #133251)

[Farzon Lotfi via llvm-commits]

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@@ -115,6 +115,7 @@ add_clang_library(clangCodeGen
   PatternInit.cpp
   SanitizerMetadata.cpp
   SwiftCallingConv.cpp
+  LangBuiltins/CGHLSLBuiltins.cpp
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farzonl wrote:

done!

https://github.com/llvm/llvm-project/pull/133251