[Stable Yoga Only] Drop TripleO periodic jobs

TripleO has decided to branch selectively[1], last
branched release was wallaby and next would probably
be zed.

This patch drops TripleO periodic jobs which are
continuosly failing since yoga branched.

Also drop job definitions for these jobs as these
are no longer used.

[1] https://specs.openstack.org/openstack/tripleo-specs/specs/xena/tripleo-independent-release.html

Change-Id: I550cde7d6c372e24641c709fcab58027faa412cf

Author: karelyatin

zuul.d/job-templates.yaml

@@ -85,19 +85,6 @@
             voting: true
         - ironic-tempest-ipa-wholedisk-bios-agent_ipmitool-tinyipa
         - openstacksdk-functional-devstack-networking
-        - tripleo-ci-centos-9-content-provider
-        - neutron-centos-9-tripleo-standalone:
-            voting: true
-            vars: &consumer_vars
-              consumer_job: true
-              build_container_images: false
-              remove_tags:
-                - build
-            dependencies: &consumer_deps
-              - tripleo-ci-centos-9-content-provider
-        - neutron-ovn-tripleo-ci-centos-9-containers-multinode:
-            vars: *consumer_vars
-            dependencies: *consumer_deps
         - neutron-linuxbridge-tempest-plugin-scenario-nftables
         - neutron-ovs-tempest-plugin-scenario-iptables_hybrid-nftables
         - devstack-enforce-scope