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>
This PR will add separate directory to handle the external manifest. Here external manifests will have same namespace (rook-ceph) for external cluster.
Signed-off-by: smoshiur1237 <moshiur.rahman@est.tech>