fix: adapt NS naming conventions

Signed-off-by: Matthias Riegler <me@xvzf.tech>

config/default/kustomization.yaml

@@ -1,5 +1,5 @@
 # Adds namespace to all resources.
-namespace: composable-operator
+namespace: composable-system
 
 # Value of this field is prepended to the
 # names of all resources, e.g. a deployment named