Add jobs without the pre-built wheels

All normal CI jobs use wheels that have been built previously, but
possibly are no longer buildable with the current set of requirements.
Add jobs that do not use these wheels to the experimental pipeline for
now.

Change-Id: Id2a5bca02ad37b5fbe3391ece9944112234ac52a

.zuul.d/jobs.yaml

@@ -53,6 +53,46 @@
     vars:
       tox_envlist: py311-check-uc
 
+- job:
+    name: requirements-tox-py38-check-uc-no-wheels
+    parent: requirements-tox-py38-check-uc
+    description: |
+      Run test for requirements project.
+
+      Uses tox with the ``py38-check-uc`` environment.
+      Does not use wheel mirror.
+    pre-run: playbooks/drop-wheel-mirror.yaml
+
+- job:
+    name: requirements-tox-py39-check-uc-no-wheels
+    parent: requirements-tox-py39-check-uc
+    description: |
+      Run test for requirements project.
+
+      Uses tox with the ``py39-check-uc`` environment.
+      Does not use wheel mirror.
+    pre-run: playbooks/drop-wheel-mirror.yaml
+
+- job:
+    name: requirements-tox-py310-check-uc-no-wheels
+    parent: requirements-tox-py310-check-uc
+    description: |
+      Run test for requirements project.
+
+      Uses tox with the ``py310-check-uc`` environment.
+      Does not use wheel mirror.
+    pre-run: playbooks/drop-wheel-mirror.yaml
+
+- job:
+    name: requirements-tox-py311-check-uc-no-wheels
+    parent: requirements-tox-py311-check-uc
+    description: |
+      Run test for requirements project.
+
+      Uses tox with the ``py311-check-uc`` environment.
+      Does not use wheel mirror.
+    pre-run: playbooks/drop-wheel-mirror.yaml
+
 - job:
     name: requirements-tox-validate-projects
     parent: openstack-tox

.zuul.d/project.yaml

@@ -123,6 +123,10 @@
       jobs:
         - nova-ceph-multistore
         - nova-next
+        - requirements-tox-py38-check-uc-no-wheels
+        - requirements-tox-py39-check-uc-no-wheels
+        - requirements-tox-py310-check-uc-no-wheels
+        - requirements-tox-py311-check-uc-no-wheels
         - tempest-integrated-storage
         - tempest-pg-full:
             irrelevant-files:

playbooks/drop-wheel-mirror.yaml

@@ -0,0 +1,9 @@
+- hosts: all
+
+  tasks:
+    - name: Drop wheel mirror from pip.conf
+      become: yes
+      lineinfile:
+        path: /etc/pip.conf
+        regexp: "^extra-index-url"
+        state: absent