Fix: rollback to docker images for file-metrics-collector #681

Job	Run time
Publish Charm / Generate the Charm Matrix	5s
Run Tests / Lint	17s
Run Tests / Integration tests (microk8s) (katib-controller)	40m 23s
Run Tests / Integration tests (microk8s) (katib-db-manager)	46m 21s
Run Tests / Test the bundle	1h 50m 2s
Run Tests / Unit tests (katib-controller)	20s
Run Tests / Unit tests (katib-db-manager)	16s
Run Tests / Check libraries (katib-controller) / Check libraries	33s
Run Tests / Check libraries (katib-controller) / Lint	8s
Run Tests / Check libraries (katib-db-manager) / Check libraries	29s
Run Tests / Check libraries (katib-db-manager) / Lint	9s
Run Tests / Check libraries (katib-ui) / Check libraries	28s
Run Tests / Check libraries (katib-ui) / Lint	11s
Publish Charm / Publish Charm (./charms/katib-ui)	20m 56s
Publish Charm / Publish Charm (./charms/katib-controller)	30m 43s
Publish Charm / Publish Charm (./charms/katib-db-manager)	28m 33s
	4h 39m 54s

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