Remove retired project Senlin job

Senlin project has been retired[1] so removing
its ref and job from sdk gate otherwise it will fail.

Also removing os-client-config-tox-tips job template from check and
gate queue, as the job was redefined [2] to use py311 instead of py38
and py311 is not yet supported on yoga and older branches and the job
started to block the gate.

Changes:
  .zuul.yaml

Centos Stream 8 nodeset is dropped so it's time to drop the
dib-nodepool-functional-openstack-centos-8-stream-src job as well.

[1] https://review.opendev.org/c/openstack/governance/+/919347
[2] I10c1ae5173f2156211a8c7e03c79d4769be605cf

Change-Id: I7e25e30b95ebb8df7984a706ece432813554a395
(cherry picked from commit 8091075e3b)
(cherry picked from commit 8e9e4cc974)
(cherry picked from commit eee309c588)
(cherry picked from commit a3c6499ab8)
(cherry picked from commit 28a207ae6e)
(cherry picked from commit 1cc0a16bd1)
(cherry picked from commit 654915eda7)

.zuul.yaml

@@ -214,25 +214,6 @@
         OPENSTACKSDK_HAS_SWIFT: 0
         OPENSTACKSDK_HAS_MAGNUM: 1
 
-- job:
-    name: openstacksdk-functional-devstack-senlin
-    parent: openstacksdk-functional-devstack
-    description: |
-      Run openstacksdk functional tests against a master devstack with senlin
-    required-projects:
-      - openstack/senlin
-    vars:
-      devstack_plugins:
-        senlin: https://opendev.org/openstack/senlin
-      devstack_services:
-        s-account: false
-        s-container: false
-        s-object: false
-        s-proxy: false
-      tox_environment:
-        OPENSTACKSDK_HAS_SWIFT: 0
-        OPENSTACKSDK_HAS_SENLIN: 1
-
 - job:
     name: openstacksdk-functional-devstack-ironic
     parent: openstacksdk-functional-devstack-minimum
@@ -378,7 +359,6 @@
       - openstack-python3-ussuri-jobs
       - openstacksdk-functional-tips
       - openstacksdk-tox-tips
-      - os-client-config-tox-tips
       - osc-tox-unit-tips
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
@@ -386,10 +366,8 @@
       jobs:
         - opendev-buildset-registry
         - nodepool-build-image-siblings
-        - dib-nodepool-functional-openstack-centos-8-stream-src
         - openstacksdk-functional-devstack
         - openstacksdk-functional-devstack-networking
-        - openstacksdk-functional-devstack-senlin
         - openstacksdk-functional-devstack-magnum:
             voting: false
         - openstacksdk-functional-devstack-masakari:
@@ -415,7 +393,5 @@
       jobs:
         - opendev-buildset-registry
         - nodepool-build-image-siblings
-        - dib-nodepool-functional-openstack-centos-8-stream-src
         - openstacksdk-functional-devstack
         - openstacksdk-functional-devstack-networking
-        - openstacksdk-functional-devstack-senlin