ci: bootstrap juju controller with agent version 3.5.0 (#374) (#375) #133

Job	Run time
Run Tests / Individual charm's integration tests (controller)	6h 0m 16s
Run Tests / Bundle Integration	28m 32s
Run Tests / Lint Code (controller)	19s
Run Tests / Individual charm's integration tests (ui)	15m 40s
Run Tests / Lint Code (ui)	21s
Run Tests / Unit Test (controller)	22s
Run Tests / Unit Test (ui)	53s
Run Tests / Check libraries (jupyter-controller) / Check libraries	24s
Run Tests / Check libraries (jupyter-controller) / Lint	11s
Run Tests / Check libraries (jupyter-ui) / Check libraries	18s
Run Tests / Check libraries (jupyter-ui) / Lint	13s
Publish Charm	0s
	6h 47m 29s

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