fix(gitlab-ci): pin poetry and tox requirements for compatibility

Pin the poetry and tox version numbers to a know good set. Ensure that
we're using the most recent CI pipeline templates. The most recent (as
of writing) version of tox conflicts with the most recent poetry.

.gitlab-ci.yml

@@ -2,7 +2,7 @@
 include:
   - project: 'uis/devops/continuous-delivery/ci-templates'
     file: '/auto-devops/common-pipeline.yml'
-    ref: v3.0.0
+    ref: v3.6.0
 
 variables:
   # we don't have an application for DAST to run against, so disable it
@@ -19,4 +19,5 @@ python:tox:
   variables:
     TOX_ENV: py3-$DJANGO_VERSION
     TOX_OPTS: -e $TOX_ENV
-    TOX_ADDITIONAL_REQUIREMENTS: poetry
+    TOX_REQUIREMENT: tox==4.11.4
+    TOX_ADDITIONAL_REQUIREMENTS: poetry==1.7.1