Update interop test first step

[albfan]

Instead of using

https://gitlab.cee.redhat.com/crc/qe-platform/-/blob/master/orchestrator/openshift-local/interop/ocp/01-interop-bundles.yaml?ref_type=heads

use

https://gitlab.cee.redhat.com/crc/qe-platform/-/blob/master/orchestrator/openshift-local/bundles/openshift/build-bundle.yaml?ref_type=heads

[albfan]

Step one for interop can be replaced with:

https://gitlab.cee.redhat.com/crc/qe-platform/-/merge_requests/277

./build-bundle.sh --all 4.18.0.rc6