Add fbc-import-from-index job

[vfreex]

This job is used to import FBC objects into art-fbc repo from published RH operator index.

Requires openshift-eng/art-tools#1392
Test job run: https://art-jenkins.apps.prod-stable-spoke1-dc-iad2.itup.redhat.com/job/hack/job/yuxzhu/job/aos-cd-builds/job/build%252Ffbc-import-from-index/9/
For the result, look at "art-*" branches in https://github.com/openshift-priv/art-fbc

[openshift-ci]

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[vfreex]

/hold testing in hackspace

[vfreex]

/hold cancel

[openshift-ci]

@vfreex: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/security	1bb770f	link	false	/test security

Full PR test history. Your PR dashboard.

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