[codespell] Adding CI target for Tox Codespell

Third in a series of commits to add Codespell to Ironic Repos. This commit adds the Tox Target to CI

A future commit could potentially add a git-blame-ignore-revs file if their are lots of spelling mistakes that could clutter git blame.

Change-Id: I08ecde1afbda435e0e45d2b6d1edbca52a643e07

zuul.d/bifrost-jobs.yaml

@@ -234,3 +234,11 @@
     parent: bifrost-base
     timeout: 7200
     run: playbooks/ci/benchmark-ironic.yaml
+
+
+- job:
+    name: bifrost-tox-codespell
+    parent: openstack-tox
+    timeout: 7200
+    vars:
+      tox_envlist: codespell

zuul.d/project.yaml

@@ -54,6 +54,9 @@
               - ^test-requirements.txt$
               - ^tools/.*$
               - ^tox.ini$
+
+        - bifrost-tox-codespell:
+            voting: false
     gate:
       jobs:
         - bifrost-tox-linters