container: Add podman secret support

roles/container/meta/argument_specs.yaml

@@ -66,6 +66,24 @@ argument_specs:
         required: false
         default: []
         elements: str
+      container_secrets:
+        description: A list of secrets available to the container in /run/secrets/<secret name>
+        type: list
+        required: false
+        default: []
+        elements: dict
+        options:
+          name:
+            description: Name of the secret
+            type: str
+            required: true
+          value:
+            description:
+              - Value of the secret. Defaults to a 128-character random string containing alphanumeric characters.
+              - If the value is not explicitly set, it will not be changed if the secret already exists.
+            type: str
+            required: false
+
       container_env:
         description: A dict of environment variables for the container
         type: dict