feat: decouple ui container from backend #179

Job	Run time
rancher (latest)	1m 43s
crc (okd)	28m 54s
build-operator-bundle	2m 1s
rancher (v1.23.17-k3s1)	2m 26s
rancher (v1.24.17-k3s1)	1m 48s
rancher (v1.25.16-k3s4)	2m 17s
rancher (v1.26.15-k3s1)	1m 46s
rancher (v1.27.15-k3s2)	1m 59s
rancher (v1.28.11-k3s2)	1m 39s
run-ci / check-images	2s
run-ci / e2e-ui-integration-tests	5m 59s
run-ci / e2e-api-integration-tests	5m 38s
	56m 12s

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