tests: pin deployed charms to a latest and stable version (#164) #76

Job	Run time
Run Tests / Integration Test (argo-controller)	13m 28s
Run Tests / Lint Code (argo-controller)	32s
Run Tests / Unit Tests (argo-controller)	29s
Run Tests / Lint Code (argo-server)	44s
Run Tests / Unit Tests (argo-server)	21s
Run Tests / Check libraries (argo-controller) / Check libraries	30s
Run Tests / Check libraries (argo-controller) / Lint	18s
Run Tests / Check libraries (argo-server) / Check libraries	5s
Run Tests / Check libraries (argo-server) / Lint	7s
Publish Charm / Generate the Charm Matrix	2s
Publish Charm / Publish Charm (./charms/argo-controller)	3m 38s
Publish Charm / Publish Charm (./charms/argo-server)	1m 33s
	21m 47s

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