Tests

[DPE-2977][DPE-2978][DPE-2979][DPE-3189] - refactor: restructure entire codebase into managers, events + core #703

Job	Run time
Unit tests	1m 4s
Lint	26s
Build charms / Get workflow version / Get workflow version	3s
Build charms / Collect charms	10s
Build charms / Build zookeeper charm \| 22.04	11m 6s
Build charms / Build application charm \| 22.04	1m 15s
integration-password-rotation	9m 9s
integration-provider	15m 18s
integration-tls	24m 9s
integration-upgrade	3m 14s
integration-replication	16m 51s
${{ matrix.tox-environments }}	0s
	1h 22m 45s

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