[clangd] Dont include version string in update tasks

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.

Differential Revision: https://reviews.llvm.org/D124013

Author: kadircet

clang-tools-extra/clangd/TUScheduler.cpp

@@ -798,7 +798,7 @@ ASTWorker::~ASTWorker() {
 
 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