feat(infrastructure): add basic terraform resources

tofu/config/maxscale/mariadb-secret.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: mariadb-secret
+  namespace: mariadb-operator
+  labels:
+    k8s.mariadb.com/watch: ""
+stringData:
+  password: ${password}
+  user-password: ${user_password}
+  root-password: ${root_password}