[clang] [Clang] Add support for [[msvc::noinline]] attribute. (PR #91720)

[Xu Zhang via cfe-commits]

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@@ -1997,9 +1997,12 @@ def Convergent : InheritableAttr {
 def NoInline : DeclOrStmtAttr {
   let Spellings = [CustomKeyword<"__noinline__">, GCC<"noinline">,
                    CXX11<"clang", "noinline">, C23<"clang", "noinline">,
+                   CXX11<"msvc", "noinline">, C23<"msvc", "noinline">,
                    Declspec<"noinline">];
   let Accessors = [Accessor<"isClangNoInline", [CXX11<"clang", "noinline">,
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simonzgx wrote:

`[[msvc::noinline]]` is just an alias of `[[clang::noinline]]`, and maybe we don't really need UT for it, so I just deleted the redundant test files. What do you think?

https://github.com/llvm/llvm-project/pull/91720