[clangd] Dont include version string in update tasks

[kadircet]

Summary

This increases cardinality of span latency metrics. Currently this was
being shown to the user via file status updates as Running Update (x) after
this change we'll only display Running Update. This also affects logs in case
of a crash, but contents and version number for inputs are printed separately in
that case already.

clang-tools-extra/clangd/TUScheduler.cpp

#ifndef NDEBUG
   assert(Done && "handle was not destroyed");
   assert(Requests.empty() && !CurrentRequest &&
          "unprocessed requests when destroying ASTWorker");
 #endif
 }
 
 void ASTWorker::update(ParseInputs Inputs, WantDiagnostics WantDiags,
                        bool ContentChanged) {
-  std::string TaskName = llvm::formatv("Update ({0})", Inputs.Version);
+  llvm::StringLiteral TaskName = "Update";
   auto Task = [=]() mutable {
     // Get the actual command as `Inputs` does not have a command.
     // FIXME: some build systems like Bazel will take time to preparing
     // environment to build the file, it would be nice if we could emit a
     // "PreparingBuild" status to inform users, it is non-trivial given the
     // current implementation.
     auto Cmd = CDB.getCompileCommand(FileName);
     // If we don't have a reliable command for this file, it may be a header.