[clang] [Clang][AMDGPU] Add ``amdgcn_av("none")`` attribute for atomic expressions (PR #199622)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,c,h -- clang/test/CodeGen/AMDGPU/amdgcn-av-non-atomic.cpp clang/test/CodeGen/AMDGPU/amdgcn-av-none-amdgpu-atomic.cpp clang/test/CodeGen/AMDGPU/amdgcn-av-none-attr-c-atomic.c clang/test/CodeGen/AMDGPU/amdgcn-av-none-attr.cpp clang/include/clang/Basic/Builtins.h clang/lib/CodeGen/CGAtomic.cpp clang/lib/CodeGen/CGBuiltin.cpp clang/lib/CodeGen/CGStmt.cpp clang/lib/CodeGen/CodeGenFunction.h clang/lib/CodeGen/TargetBuiltins/AMDGPU.cpp clang/lib/CodeGen/Targets/AMDGPU.cpp clang/lib/Sema/SemaStmtAttr.cpp clang/utils/TableGen/ClangBuiltinsEmitter.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/clang/lib/CodeGen/TargetBuiltins/AMDGPU.cpp b/clang/lib/CodeGen/TargetBuiltins/AMDGPU.cpp
index 5702fdec3..16a0cd372 100644
--- a/clang/lib/CodeGen/TargetBuiltins/AMDGPU.cpp
+++ b/clang/lib/CodeGen/TargetBuiltins/AMDGPU.cpp
@@ -2003,8 +2003,7 @@ Value *CodeGenFunction::EmitAMDGPUBuiltinExpr(unsigned BuiltinID,
     if (Volatile)
       RMW->setVolatile(true);
     if (!AMDGCNAVMode.empty()) {
-      llvm::MMRAMetadata::appendTags(*RMW,
-                                     {{"amdgcn-av", AMDGCNAVMode}});
+      llvm::MMRAMetadata::appendTags(*RMW, {{"amdgcn-av", AMDGCNAVMode}});
     }
 
     unsigned AddrSpace = Ptr.getType()->getAddressSpace();

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https://github.com/llvm/llvm-project/pull/199622