feat: decouple ui container from backend #159

Job	Run time
build-operator-bundle	3m 4s
crc (okd)	29m 36s
rancher (latest)	1m 41s
rancher (v1.23.17-k3s1)	1m 55s
rancher (v1.24.17-k3s1)	1m 43s
rancher (v1.25.16-k3s4)	1m 51s
rancher (v1.26.15-k3s1)	1m 43s
rancher (v1.27.15-k3s2)	1m 41s
rancher (v1.28.11-k3s2)	1m 50s
run-ci / check-images	3s
run-ci / e2e-ui-integration-tests	5m 37s
run-ci / e2e-api-integration-tests	4m 25s
	55m 9s

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