Split bootstrap into bs + setup (#6416)

* Split bootstrap into bs + setup

* Lint

tests/components/image_processing/test_init.py

@@ -3,7 +3,7 @@ from unittest.mock import patch, PropertyMock
 
 from homeassistant.core import callback
 from homeassistant.const import ATTR_ENTITY_PICTURE
-from homeassistant.bootstrap import setup_component
+from homeassistant.setup import setup_component
 from homeassistant.exceptions import HomeAssistantError
 import homeassistant.components.http as http
 import homeassistant.components.image_processing as ip