`slack-19.0`: use `slackhq/vitess-addons@v0.19.7` #3961

Job	Run time
Local example using consul on ubuntu-22.04	8m 44s
Local example using etcd on ubuntu-22.04	8m 48s
Local example using zk2 on ubuntu-22.04	8m 44s
	26m 16s

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