Revert change lb group to use namespace delete and add #2435

Job	Run time
build	10m 1s
build-arm64	23m 7s
build-ceph	2m 3s
atom	17m 35s
demo	3m 45s
demo-secure	3m 53s
discovery (container)	3m 54s
discovery (embedded)	4m 4s
pytest (cli)	4m 22s
ha (sanity)	3m 49s
pytest (cli_change_lb)	4m 27s
ha (state_transitions)	4m 37s
pytest (state)	2m 21s
ha (state_transitions_both_gws)	6m 31s
pytest (multi_gateway)	2m 16s
pytest (server)	2m 30s
ha (state_transitions_loop)	12m 55s
pytest (grpc)	2m 33s
ha (state_transitions_rand_loop)	10m 38s
pytest (omap_lock)	3m 18s
ha (late_registration)	4m 39s
ha (late_registration_loop)	9m 2s
pytest (old_omap)	2m 1s
ha (4gws)	8m 41s
pytest (log_files)	3m 1s
ha (4gws_loop)	11m 11s
pytest (nsid)	3m 3s
ha (4gws_create_delete)	8m 43s
pytest (psk)	2m 5s
ha (4gws_create_delete_loop)	11m 18s
ha (namespaces)	12m 33s
ha (namespaces_loop)	12m 46s
ha (mtls)	3m 31s
ha (notify)	2m 10s
ha (ceph_status)	2m 7s
push-images-to-ceph-registry	1s
	3h 45m 31s

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