Tests

fix: properly remove old zNodes during relation-broken #732

Job	Run time
Lint	25s
Unit tests	1m 28s
Build charms / Get workflow version / Get workflow version	2s
Build charms / Collect charms	12s
Build charms / Build zookeeper charm \| base #0	1m 43s
Build charms / Build application charm \| base #0	2m 49s
integration-password-rotation	11m 37s
integration-provider	13m 52s
integration-tls	4m 40s
integration-upgrade	1s
integration-replication	1s
${{ matrix.tox-environments }}	1s
	36m 51s

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