[release-19.0] Bump to `v19.0.6-SNAPSHOT` after the `v19.0.5` release #42601

Job	Run time
Local example using consul on ubuntu-22.04	5m 30s
Local example using consul on ubuntu-22.04	8m 42s
Local example using etcd on ubuntu-22.04	5m 49s
Local example using etcd on ubuntu-22.04	8m 27s
Local example using zk2 on ubuntu-22.04	5m 54s
Local example using zk2 on ubuntu-22.04	8m 35s
	42m 57s

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