Add support for OCI tarball url #5483

Job	Run time
CI / setup	1s
CI / test_pinniped_proxy	1m 26s
CI / test_go	2m 57s
CI / Build dashboard image	22s
CI / Build E2E runner image	1m 1s
CI / Build apprepository-controller image	2m 10s
CI / Build asset-syncer image	2m 7s
CI / test_chart_render	15s
CI / test_dashboard	2m 53s
CI / Build kubeapps-apis image	2m 40s
CI / test_oci_catalog	1m 7s
CI / Build pinniped-proxy image	2m 13s
CI / sync_chart_from_bitnami	0s
CI / Build oci-catalog image	1m 56s
CI / linters / golang-linter	1m 51s
CI / linters / license-headers-linter	45s
CI / linters / yaml-linter	6s
CI / linters_result	1s
CI / push_dev_images	0s
CI / gke_setup	0s
CI / local_e2e_tests	0s
CI / GKE_REGULAR_VERSION	0s
CI / GKE_STABLE_VERSION	0s
CI / local_e2e_tests_result	1s
CI / push_images	0s
CI / sync_chart_to_bitnami	0s
CI / release	0s
	23m 52s

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