Investiagte OpenShift CI secret management and migrate maistra postsubmit jobs

Investiagte OpenShift CI secret management and migrate maistra postsubmit jobs

1. This story is related to learn how OpenShift CI onboards service team secrets such as quay token, pull secret or access credentials.
Ref: https://docs.ci.openshift.org/docs/how-tos/adding-a-new-secret-to-ci/

This will also help evaluate our integ tests migration and set up post-submit jobs.

2. Investigate how OpenShift CI onboards service team post submit jobs.
Last time, I talked to a CI team ppl and he suggested service owner need to follow the image build section and add a promotion spec before creating a post-submit job.
Ref: https://docs.ci.openshift.org/docs/architecture/ci-operator/#post-submit-tests