[clang-tools-extra] [clangd] Apply modernize-use-string-view to the code (PR #180335)

[Aleksandr Platonov via cfe-commits]

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@@ -30,7 +30,7 @@ std::string platformString() {
   return PlatformString;
 }
 
-std::string featureString() {
+llvm::StringRef featureString() {
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ArcsinX wrote:

> But it strange for me why all the checks including the building and testing did not fail here...

Remote index functionality is not enabled by default (and also has gRPC as additional requirement).
I guess that the number of configurations that are built and tested is limited for PRs, but after the merge into main, I think some build bots will be unhappy.

https://github.com/llvm/llvm-project/pull/180335