chore: move part-specific call to LifecyclePartsCommand

Signed-off-by: Callahan Kovacs <callahankovacs@gmail.com>

craft_application/commands/lifecycle.py

@@ -188,7 +188,6 @@ def _run(
         shell = getattr(parsed_args, "shell", False)
         shell_after = getattr(parsed_args, "shell_after", False)
         debug = getattr(parsed_args, "debug", False)
-        parts = getattr(parsed_args, "parts", None)
 
         step_name = step_name or self.name
 
@@ -198,10 +197,7 @@ def _run(
             shell_after = True
 
         try:
-            self._services.lifecycle.run(
-                step_name=step_name,
-                part_names=parts,
-            )
+            self._run_lifecycle(parsed_args, step_name)
         except Exception as err:
             if debug:
                 emit.progress(str(err), permanent=True)
@@ -211,6 +207,14 @@ def _run(
         if shell_after:
             _launch_shell()
 
+    def _run_lifecycle(
+        self,
+        parsed_args: argparse.Namespace,  # noqa: ARG002 (unused argument is for subclasses)
+        step_name: str | None = None,
+    ) -> None:
+        """Run the lifecycle."""
+        self._services.lifecycle.run(step_name=step_name)
+
     @staticmethod
     def _should_add_shell_args() -> bool:
         return True
@@ -233,6 +237,16 @@ def _fill_parser(self, parser: argparse.ArgumentParser) -> None:
             help="Optional list of parts to process",
         )
 
+    @override
+    def _run_lifecycle(
+        self, parsed_args: argparse.Namespace, step_name: str | None = None
+    ) -> None:
+        """Run the lifecycle, optionally for a part or list of parts."""
+        self._services.lifecycle.run(
+            step_name=step_name,
+            part_names=parsed_args.parts,
+        )
+
 
 class PullCommand(LifecyclePartsCommand):
     """Command to pull parts."""