migrate: Ignore too-many-statements check

Migration scripts are throw-away, so not having a very good design/long
functions is not a big issue.

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>

Author: llucax

.github/cookiecutter-migrate.template.py

@@ -21,7 +21,7 @@
 """  # noqa: E501
 
 # R0801 is similarity detection, as the template is always similar to the current script
-# pylint: disable=too-many-lines, too-many-locals, too-many-branches, R0801
+# pylint: disable=too-many-lines, too-many-locals, too-many-branches, too-many-statements, R0801
 
 import hashlib
 import json

cookiecutter/migrate.py

@@ -21,7 +21,7 @@
 """  # noqa: E501
 
 # R0801 is similarity detection, as the template is always similar to the current script
-# pylint: disable=too-many-lines, too-many-locals, too-many-branches, R0801
+# pylint: disable=too-many-lines, too-many-locals, too-many-branches, too-many-statements, R0801
 
 import hashlib
 import json