Bump nova-ceph-multstore timeout

The recent change(s) to enable a lot more SSHABLE checks puts the
runtime of the ceph job really close to the 2h timeout even when
things are working. Sometimes it times out before it finishes even
though things are progressing. Bump the timeout to avoid that.

Also bump us to 8G swap to match what is set on the parent ceph job
when we upgraded to jammy. We could just unset this, but better to
pin it high in case that job (defined elsewhere) changes. Our job
is the largest ceph job, so it makes sense that it keeps its own
swap level high.

Change-Id: I6cefd87671614d87d92e4675fbc989fc9453c8b9
(cherry picked from commit 6ff3237)

Author: kk7ds

.zuul.yaml

@@ -594,12 +594,13 @@
     irrelevant-files: *nova-base-irrelevant-files
     required-projects:
       - openstack/nova
+    timeout: 9000
     pre-run:
       - playbooks/ceph/glance-setup.yaml
     vars:
       # NOTE(danms): Increase our swap size since we're dealing with
       # larger images and trigger OOMs.
-      configure_swap_size: 4096
+      configure_swap_size: 8192
       # NOTE(danms): These tests create an empty non-raw image, which nova
       # will refuse because we set never_download_image_if_on_rbd in this job.
       # Just skip these tests for this case.