Merge pull request #70218 from avanthakkar/fix-read-cap-smb-pool

mgr/cephadm: scope .smb pool read cap to its own namespace

Reviewed-by: Anoop C S <anoopcs@cryptolab.net>
Reviewed-by: John Mulligan <jmulligan@redhat.com>
Reviewed-by: Shweta Sodani <ssodani@redhat.com>