cassandra: add missing sidecar permissions to testing manifests
cassandra: add missing sidecar permissions to testing manifests

Signed-off-by: Yannis Zarkadas <4575790e8e8b84da294884a87fd791e10dfc7d9d@arrikto.com>

rook/nfs,rook/nfs,rook/rook,rook/rook,rook/rook,rook/rook,rook/nfs,rook/rook