debugger: Add args argument to debugger launch config (#27953)

This also fixes a bug where debug cargo test code actions would debug
all tests in a mod instead of a specific test

Release Notes:

- N/A

crates/dap_adapters/src/gdb.rs

@@ -79,7 +79,7 @@ impl DebugAdapter for GdbDebugAdapter {
                 json!({"pid": attach_config.process_id})
             }
             dap::DebugRequestType::Launch(launch_config) => {
-                json!({"program": launch_config.program, "cwd": launch_config.cwd, "stopOnEntry": config.stop_on_entry})
+                json!({"program": launch_config.program, "cwd": launch_config.cwd, "stopOnEntry": config.stop_on_entry, "args": launch_config.args.clone()})
             }
         }
     }