Run keystone-ldap job on keystone changes

This change modifies the keystone-ldap job to run in check when
the keystone chart contains any modifications. This moves it from
running periodically to running on each keystone change.

Depends-On: https://review.opendev.org/c/openstack/openstack-helm/+/816209

Change-Id: I32008e3a14b0428922071205f873087c2aba071d

zuul.d/jobs-openstack-helm.yaml

@@ -51,6 +51,9 @@
 - job:
     name: openstack-helm-keystone-ldap
     parent: openstack-helm-chart-deploy
+    files:
+      - ^keystone/.*$
+      - ^zuul\.d/.*$
     vars:
       osh_params:
         openstack_release: train

zuul.d/project.yaml

@@ -32,6 +32,7 @@
         - openstack-helm-compute-kit-victoria-ubuntu_focal
         - openstack-helm-compute-kit-wallaby-ubuntu_focal
         - openstack-helm-horizon-train-ubuntu_bionic
+        - openstack-helm-keystone-ldap
     gate:
       jobs:
         - openstack-helm-lint
@@ -47,7 +48,6 @@
         - publish-openstack-helm-charts
     periodic:
       jobs:
-        - openstack-helm-keystone-ldap
         - openstack-helm-tungsten-fabric-train
         - openstack-helm-tungsten-fabric-ussuri
     experimental: