[DPE-2314] Add upgrade integration test #683

Job	Run time
Lint	1s
Lint	49s
Lint	49s
Unit tests	30s
Unit tests	1m 9s
Unit tests	1m 9s
Build charms / Get workflow version / Get workflow version	1s
Build charms / Get workflow version / Get workflow version	8s
Build charms / Get workflow version / Get workflow version	8s
Build charms / Collect charms	1s
Build charms / Collect charms	15s
Build charms / Collect charms	15s
Build charms / ${{ matrix.charm._job_display_name }}	1s
${{ matrix.tox-environments }}	1s
Build charms / Build kafka charm \| 22.04	4m 28s
Build charms / Build kafka charm \| 22.04	4m 28s
Build charms / Build application charm \| 22.04	2m 18s
Build charms / Build application charm \| 22.04	2m 18s
integration-charm	3m 24s
integration-charm	19m 7s
integration-provider	1m 56s
integration-provider	33m 33s
integration-scaling	17m 45s
integration-scaling	17m 45s
integration-password-rotation	1m 44s
integration-password-rotation	12m 11s
integration-tls	33m 19s
integration-tls	33m 19s
integration-upgrade	15m 6s
integration-upgrade	15m 6s
	3h 43m 4s

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