cephadm: convert get_container_binds to use class based approach

cephadm: convert get_container_binds to use class based approach

Since all types affected by get_container_binds now have the common
customize_container_binds, use a generic class-based approach by
creating an instance of ContainerDaemonForm and calling the method.
All other classes have a customize_container_binds that is a no-op.

Signed-off-by: John Mulligan <jmulligan@redhat.com>