Skip image format detection tests for compute

For reasoning, refer to the cinder patch[1].
This patch is to fix gate failures seen in the
cinder-tempest-plugin-cbak-ceph job and unblock gate.

[1] https://review.opendev.org/c/openstack/cinder/+/926287

Change-Id: Ifeb80d43cf86d97f94b6f2c19c6457abef4a2469
diff --git a/.zuul.yaml b/.zuul.yaml
index e0a0b2e..cc74f88 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -254,6 +254,11 @@
       Integration tests that runs with the ceph devstack plugin, py3
       and enable the backup service.
     vars:
+      # FIXME: change I29b1af0a4034decad to tempest added image format tests that
+      # cannot pass in this job because the image data takes a optimized path that
+      # bypasses nova's checks.  Until the nova team decides on a strategy to handle
+      # this issue, we skip these tests.
+      tempest_exclude_regex: (tempest.api.image.v2.test_images_formats.ImagesFormatTest.test_compute_rejects)
       configure_swap_size: 4096
       devstack_local_conf:
         test-config: