Enable setting a list of image_pull_secrets (#860)

When there are e.g. multiple authenticated container registries used
we need to be able to add multiple imagePullSecrets to the k8s resource

Co-authored-by: Maximilian Meister <maximilian.meister@pm.me>

config/crd/bases/awx.ansible.com_awxs.yaml

@@ -179,9 +179,11 @@ spec:
                     - never
                     - IfNotPresent
                     - ifnotpresent
-                image_pull_secret:
-                  description: The image pull secret
-                  type: string
+                image_pull_secrets:
+                  description: The image pull secrets
+                  type: array
+                  items:
+                    type: string
                 task_resource_requirements:
                   description: Resource requirements for the task container
                   properties:

config/manifests/bases/awx-operator.clusterserviceversion.yaml

@@ -252,8 +252,8 @@ spec:
         x-descriptors:
         - urn:alm:descriptor:com.tectonic.ui:advanced
         - urn:alm:descriptor:com.tectonic.ui:imagePullPolicy
-      - displayName: Image Pull Secret
-        path: image_pull_secret
+      - displayName: Image Pull Secrets
+        path: image_pull_secrets
         x-descriptors:
         - urn:alm:descriptor:com.tectonic.ui:advanced
         - urn:alm:descriptor:io.kubernetes:Secret