build dependencies: centos9

build dependencies: centos9

- ceph.spec.in: declare git as build dependency
- install-deps.sh: enable CRB repo

Test procedure:
    docker run --rm -ti  -v /home/baum/ceph-ci:/home/ceph quay.io/centos/centos:stream9 bash
    [root@a3c4b1545e93 /]# cd /home/ceph/
    [root@a3c4b1545e93 ceph]# ./install-deps.sh 2>&1 tee install-deps.log

Signed-off-by: Alexander Indenbaum <aindenba@redhat.com>
(cherry picked from commit 11a37da05305420ca37f5a3af5b8991e1e2967cb)
(cherry picked from commit 7c05f07cf6cd98e01f2668bf3b8eef6a8ce7b997)