[codespell] - Adding CI for codespell tox target

Adding CI for https://review.opendev.org/c/openstack/ironic-lib/+/905569/1

Related Bug: https://bugs.launchpad.net/ironic-python-agent/+bug/2047654

Change-Id: I8e2c7b88fcea44d5ede851b40657b0acc3cf9e54

zuul.d/ironic-lib-jobs.yaml

@@ -48,3 +48,10 @@
         s-proxy: True
       devstack_localrc:
         IRONIC_BOOT_MODE: bios
+
+- job:
+    name: ironic-lib-tox-codespell
+    parent: openstack-tox
+    timeout: 7200
+    vars:
+      tox_envlist: codespell

zuul.d/project.yaml

@@ -8,6 +8,8 @@
       jobs:
         - ironic-lib-uefi-ipmi-src
         - ironic-lib-bios-ipmi-src
+        - ironic-lib-tox-codespell:
+            voting: false
     gate:
       jobs:
         - ironic-lib-uefi-ipmi-src