Add CephObjectStore spec.hosting.advertiseEndpoint configuration. This
provides a clear documented default for which endpoint Rook "advertises"
to dependent resources like CephObjectStores, OBCs, and COSI
Buckets/Accesses and allows users to override the default behavior if
desired.
The current default is to round-robin an endpoint from
spec.hosting.dnsNames, which has proven to be troublesome for some
users' object store configurations. This change provides much-needed
disambiguation for users.
This may be a breaking change for some existing spec.hosting.dnsNames
users. This is unexpected but is documented.
Signed-off-by: Blaine Gardner <blaine.gardner@ibm.com>