Log migrations info in consistent way (#14158)

same as #13458 but for `82b7c48c147f_remove_can_read_permission_on_config_.py` migration

This migration changes logging handlers
so each next migration is differently formatted when doing
airflow db reset. This commit fixes this behavior.

(cherry picked from commit e423e38)

airflow/migrations/versions/82b7c48c147f_remove_can_read_permission_on_config_.py

@@ -23,6 +23,7 @@
 Create Date: 2021-02-04 12:45:58.138224
 
 """
+import logging
 
 from airflow.security import permissions
 from airflow.www.app import create_app
@@ -36,6 +37,9 @@
 
 def upgrade():
     """Remove can_read permission on config resource for User and Viewer role"""
+    log = logging.getLogger()
+    handlers = log.handlers[:]
+
     appbuilder = create_app(config={'FAB_UPDATE_PERMS': False}).appbuilder
     roles_to_modify = [role for role in appbuilder.sm.get_all_roles() if role.name in ["User", "Viewer"]]
     can_read_on_config_perm = appbuilder.sm.find_permission_view_menu(
@@ -48,6 +52,8 @@ def upgrade():
         ):
             appbuilder.sm.del_permission_role(role, can_read_on_config_perm)
 
+    log.handlers = handlers
+
 
 def downgrade():
     """Add can_read permission on config resource for User and Viewer role"""