[clang-tools-extra] [clangd] Add dynamic plugins support (PR #226995)

[Aleksandr Platonov via cfe-commits]

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@@ -1028,6 +1036,10 @@ clangd accepts flags on the commandline, and in the CLANGD_FLAGS environment var
   if (ForceOffsetEncoding != OffsetEncoding::UnsupportedEncoding)
     Opts.Encoding = ForceOffsetEncoding;
 
+  FeatureModuleSet ModuleSet = FeatureModuleSet::fromRegistry();
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ArcsinX wrote:

Yes, you are right. Before this change clangd in check mode was unable to see feature modules.

https://github.com/llvm/llvm-project/pull/226995