Skip functional tests on pre-commit config update

This file is used only in code style checks.

Change-Id: I0c1d6593417757c65bbb0b7ee7e503a3d3cedf12

.zuul.yaml

@@ -73,6 +73,7 @@
     irrelevant-files:
       - ^(test-|)requirements.txt$
       - ^setup.cfg$
+      - ^\.pre-commit-config\.yaml$
 
 - job:
     name: oslo.messaging-grenade-multinode
@@ -83,6 +84,7 @@
     irrelevant-files:
       - ^(test-|)requirements.txt$
       - ^setup.cfg$
+      - ^\.pre-commit-config\.yaml$
 
 - project:
     templates: