updated the external cluster doc, and helm and manifest
install to make use of csi operator as it is the default
offering now
Signed-off-by: parth-gr <partharora1010@gmail.com>
there were some places where rulenamesapce was present updated to rulesNamespaceOverride
Closes: rook#12163
Signed-off-by: parth-gr <paarora@redhat.com>