[stable-only] wallaby: Reduce CI jobs

It looks like the move to unmaintained branching might have finally
done in the bulk of our tempest testing on this branch.

Some tests still work, but basically all tempest related jobs
are trying to pull in Xena stuffs without explicit config.

At this point, the value of the branch is to receieve critical
fixes being backported, and we've decided to drop the bulk of
the testing to match the status as we don't see fixing devstack
tempest invocation as critical to meet the branch's status.

Change-Id: Ia45d7bc8e033034c14061786b95b4f47f20268d0

zuul.d/project.yaml

@@ -10,74 +10,11 @@
     check:
       jobs:
         - ironic-tox-unit-with-driver-libs
-        - ironic-tempest-functional-python3
-        # Disable grenade, jobs are failing on networking,
-        # And we're long past release at this point so we don't
-        # need to keep running the job anymore.
-        # - ironic-grenade
-        - ironic-standalone
-        - ironic-standalone-redfish
-        - ironic-tempest-partition-bios-redfish-pxe
-        - ironic-tempest-partition-uefi-redfish-vmedia
-        - ironic-tempest-wholedisk-bios-snmp-pxe
-        - ironic-tempest-ipa-partition-pxe_ipmitool
-        - ironic-tempest-ipa-partition-uefi-pxe_ipmitool
-        # NOTE(TheJulia) Marking multinode non-voting on 20210311
-        # Due to a high failure rate on limestone where the compute1
-        # machine never appears to be able to communicate across the
-        # vxlan tunnel, possible mtu issue, but non-voting until we
-        # understand it in mind for the upcoming release.
-        - ironic-tempest-ipa-wholedisk-direct-tinyipa-multinode:
-            voting: false
-        - ironic-tempest-bios-ipmi-direct-tinyipa
-        - ironic-tempest-bfv
-        - ironic-tempest-ipa-partition-uefi-pxe-grub2
         - metalsmith-integration-glance-localboot-centos8-uefi
         # Non-voting jobs
-        - ironic-tox-bandit:
-            voting: false
-        - ironic-inspector-tempest:
-            voting: false
-        - ironic-inspector-tempest-managed-non-standalone:
-            voting: false
-        - ironic-inspector-tempest-partition-bios-redfish-vmedia:
-            voting: false
-        - ironic-tempest-ipa-wholedisk-bios-ipmi-direct-dib:
-            voting: false
         - bifrost-integration-tinyipa-ubuntu-focal:
             voting: false
-        - bifrost-integration-redfish-vmedia-uefi-centos-8:
-            voting: false
-        - ironic-tempest-pxe_ipmitool-postgres:
-            voting: false
     gate:
       jobs:
-        # NOTE(TheJulia): Return this to voting once
-        # https://review.opendev.org/c/openstack/ironic/+/910528
-        # or similar change to the branch has merged
-        #- ironic-tox-unit-with-driver-libs
-        - ironic-tempest-functional-python3
-        - ironic-standalone
-        - ironic-standalone-redfish
-        - ironic-tempest-partition-bios-redfish-pxe
-        - ironic-tempest-partition-uefi-redfish-vmedia
-        - ironic-tempest-wholedisk-bios-snmp-pxe
-        - ironic-tempest-ipa-partition-pxe_ipmitool
-        - ironic-tempest-ipa-partition-uefi-pxe_ipmitool
-        # NOTE(TheJulia): Disabled multinode on 20210311 due to Limestone
-        # seeming to be 
-        # - ironic-tempest-ipa-wholedisk-direct-tinyipa-multinode
-        - ironic-tempest-bios-ipmi-direct-tinyipa
-        - ironic-tempest-bfv
-        - ironic-tempest-ipa-partition-uefi-pxe-grub2
+        - ironic-tox-unit-with-driver-libs
         - metalsmith-integration-glance-localboot-centos8-uefi
-    experimental:
-      jobs:
-        # TODO(dtantsur): these jobs are useful but currently hopelessly
-        # broken. Fix them and bring back to the gate.
-        - ironic-tempest-ipxe-ipv6:
-            voting: false
-        - ironic-grenade-multinode-multitenant:
-            voting: false
-        - ironic-inspector-tempest-discovery-fast-track:
-            voting: false