Revert change lb group to use namespace delete and add #2436

Job	Run time
build-arm64	29m 2s
build	9m 27s
build-ceph	2m 13s
atom	24m 5s
demo	3m 45s
discovery (container)	3m 56s
demo-secure	3m 49s
discovery (embedded)	3m 42s
pytest (cli)	2m 19s
pytest (cli_change_lb)	3m 10s
ha (sanity)	3m 52s
pytest (state)	2m 40s
ha (state_transitions)	4m 53s
pytest (multi_gateway)	2m 36s
ha (state_transitions_both_gws)	6m 15s
pytest (server)	2m 43s
pytest (grpc)	2m 40s
ha (state_transitions_loop)	15m 6s
pytest (omap_lock)	3m 4s
ha (state_transitions_rand_loop)	15m 11s
pytest (old_omap)	2m 9s
ha (late_registration)	4m 45s
pytest (log_files)	2m 55s
ha (late_registration_loop)	9m 44s
pytest (nsid)	3m 11s
ha (4gws)	9m 5s
pytest (psk)	2m 2s
ha (4gws_loop)	11m 15s
ha (4gws_create_delete)	8m 57s
ha (4gws_create_delete_loop)	11m 5s
ha (namespaces)	12m 8s
ha (namespaces_loop)	17m 6s
ha (mtls)	3m 45s
ha (notify)	2m 5s
ha (ceph_status)	2m 20s
push-images-to-ceph-registry	1s
	4h 7m 1s

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