Revert "Centralize the handling of completion for simple argument lists. (#82085)"

This reverts commit 21631494b068d9364b8dc8f18e59adee9131a0a5.

Reverted because of greendragon failure:

******************** TEST 'lldb-api :: functionalities/completion/TestCompletion.py' FAILED ********************
Script:

1 files changed, 18 insertions, 1 deletions

diff --git a/lldb/source/Commands/CommandObjectProcess.cpp b/lldb/source/Commands/CommandObjectProcess.cpp
index 7cd5ad6..722b0e0 100644
--- a/lldb/source/Commands/CommandObjectProcess.cpp
+++ b/lldb/source/Commands/CommandObjectProcess.cpp
@@ -143,6 +143,14 @@ public:
 
   ~CommandObjectProcessLaunch() override = default;
 
+  void
+  HandleArgumentCompletion(CompletionRequest &request,
+                           OptionElementVector &opt_element_vector) override {
+
+    lldb_private::CommandCompletions::InvokeCommonCompletionCallbacks(
+        GetCommandInterpreter(), lldb::eDiskFileCompletion, request, nullptr);
+  }
+
   Options *GetOptions() override { return &m_all_options; }
 
   std::optional<std::string> GetRepeatCommand(Args &current_command_args,
@@ -1007,7 +1015,9 @@ public:
                            OptionElementVector &opt_element_vector) override {
     if (!m_exe_ctx.HasProcessScope())
       return;
-    CommandObject::HandleArgumentCompletion(request, opt_element_vector);
+
+    lldb_private::CommandCompletions::InvokeCommonCompletionCallbacks(
+        GetCommandInterpreter(), lldb::eDiskFileCompletion, request, nullptr);
   }
 
   Options *GetOptions() override { return &m_options; }
@@ -1282,6 +1292,13 @@ public:
 
   Options *GetOptions() override { return &m_options; }
 
+  void
+  HandleArgumentCompletion(CompletionRequest &request,
+                           OptionElementVector &opt_element_vector) override {
+    CommandCompletions::InvokeCommonCompletionCallbacks(
+        GetCommandInterpreter(), lldb::eDiskFileCompletion, request, nullptr);
+  }
+
   class CommandOptions : public Options {
   public:
     CommandOptions() = default;