tests: generalize secret cli parser to work for all cli commands

pkgs/clan-cli/tests/helpers/cli.py

@@ -1,14 +1,14 @@
 import argparse
 
-from clan_cli.secrets import register_parser
+from clan_cli import create_parser
 
 
-class SecretCli:
+class Cli:
     def __init__(self) -> None:
-        self.parser = argparse.ArgumentParser()
-        register_parser(self.parser)
+        self.parser = create_parser(prog="clan")
 
     def run(self, args: list[str]) -> argparse.Namespace:
         parsed = self.parser.parse_args(args)
-        parsed.func(parsed)
+        if hasattr(parsed, "func"):
+            parsed.func(parsed)
         return parsed