[lldb] Don't tab complete stop-hook delete beyond 1st argument

This already applies to enable and disable, delete was missing
a check.

This cannot be tested properly with the current completion tests,
but it will be when I make them more strict in a follow up patch.

Author: DavidSpickett

lldb/source/Commands/CommandObjectTarget.cpp

@@ -4942,6 +4942,8 @@ class CommandObjectTargetStopHookDelete : public CommandObjectParsed {
   void
   HandleArgumentCompletion(CompletionRequest &request,
                            OptionElementVector &opt_element_vector) override {
+    if (request.GetCursorIndex())
+      return;
     lldb_private::CommandCompletions::InvokeCommonCompletionCallbacks(
         GetCommandInterpreter(), lldb::eStopHookIDCompletion, request, nullptr);
   }