* dotnet/master: (21 commits)
  added completion set and fix all telemetry to track performance (#22811)
  porting named pipe fix from service hub. (#22863)
  remove duplicated reference in the test (#22787)
  Fix unit test failures from merge resolution
  fixed regression on using nuget (#22809)
  Fix few more doc comments
  When creating child items in Call Hierarchy, use the correct project
  Make tests easier to diagnose if the fail
  Remove duplicate test helpers and put overloads right next to each other
  Remove duplicate project references.
  Fixed some doc comments
  Address review feedback and remove IsExpression and IsStatement properties.
  Address more feedback from design meeting and expose IOperation.IsExpression and IOperation.IsStatement properties
  Namespace change for IOperation APIs
  Fix unit test
  Unit test changes for IOperation API changes
  Update the summaries and descriptions of these packages to not be wrong
  Remove exact version requirements in our Razor NuGet packages
  Test framework changes for IOperation API changes
  Fix IDE analyzers for IOperation API changes
  ...