ceph-dev-new-*: change for in-tree container builds

ceph-dev-new-*: change for in-tree container builds

- invoke ${SRC}/container/build.sh to build the container
- do not check out ceph-container.git
- add test to loop for "is repo ready" to test for the jenkins job
  url ${BUILD_URL} as well as ready, so that we're not racing against
  preexisting repos for this branch/os/flavor

Also: move podman login from container build to setup_rpm

ceph.git's build.sh does not handle authentication in its latest
version, but assumes it's been done.  Add the authentication
step (podman login) here, in setup_rpm, with the side benefit
that it'll fail faster if the credentials are incorrect.

Signed-off-by: Dan Mick <dmick@redhat.com>