[clang] [clang-tools-extra] [clangd][HLSL] Fix register attribute source range for hover inside arguments (PR #212881)

[Finn Plummer via cfe-commits]

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@@ -185,6 +185,7 @@ void Parser::ParseHLSLAnnotations(ParsedAttributes &Attrs,
   if (EndLoc)
     *EndLoc = Tok.getLocation();
 
+  SourceLocation AttrEndLoc = Loc;
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inbelic wrote:

Should we be using and updating the `EndLoc` above instead of creating a new one?

https://github.com/llvm/llvm-project/pull/212881