Add ansible-galaxy requirements to STO

This change [0] in the ansible-operator introduced the
removal of both k8s and operator_sdk.util from the base image.
This means we now need to add the dependendencies ourselves
when building STO.

[0] operator-framework/operator-sdk#6483

build/Dockerfile

@@ -1,4 +1,4 @@
-FROM quay.io/operator-framework/ansible-operator:v1.35.0
+FROM quay.io/operator-framework/ansible-operator:v1.31.0
 
 # temporarily switch to root user to adjust image layers
 USER 0

requirements.yaml

@@ -0,0 +1,41 @@
+# NOTE(vkmc) Great docs from https://github.com/jmazzitelli/kiali-operator/blob/master/requirements.yml
+#
+# This is the Ansible Galaxy requirements that need to be installed locally to be able to run
+# the operator Ansible playbook locally.
+#
+# To install these into your local Ansible environment:
+#   ansible-galaxy collection install -r requirements.yml --force-with-deps
+#
+# Make sure these collections match that which is inside the Ansible Operator SDK base image.
+# You can determine what collections are installed by looking in the base image like this:
+#
+# podman run \
+#   -it --rm --entrypoint '' \
+#   quay.io/openshift/origin-ansible-operator:4.13 \
+#   ls /opt/ansible/.ansible/collections/ansible_collections
+#
+# To determine the version of a specific collection, look at the MANIFEST.json:
+#
+# podman run \
+#   -it --rm --entrypoint '' \
+#   quay.io/openshift/origin-ansible-operator:4.13 \
+#   cat /opt/ansible/.ansible/collections/ansible_collections/kubernetes/core/MANIFEST.json | grep version
+#
+# It is best if you have the same version of Ansible installed locally as found in the base image. You can determine
+# the version of Ansible in the base image via:
+#
+# podman run \
+#   -it --rm --entrypoint '' \
+#   quay.io/openshift/origin-ansible-operator:4.13 \
+#   ansible --version
+#
+# To install that version locally, you can git clone the source via:
+#   git clone -b v<ansible version> --depth 1 https://github.com/ansible/ansible.git
+# and then set up your environment via:
+#   source ./ansible/hacking/env-setup -q
+
+collections:
+- name: kubernetes.core
+  version: 2.2.3
+- name: operator_sdk.util
+  version: 0.4.0