Optimize wait for prod images to be run after ci images (#13562)
Optimize wait for prod images to be run after ci images (#13562)

This change slightly optimizes waiting for prod images. Waiting
for images necessarily takes one slot from jobs queue, even if
those jobs do nothing at all. This is unfortunate, but seems
there is no easy way to do it differently because GitHub
Actions does not support yet cross-workflow dependencies.

This PR optimizes waiting for images in the way that PROD images
and CI images waiting happen sequentially rather than in parallell.

PROD images are, as of #13557 prepared sequentially which
means that there is no point to wait for PROD images in parallel
to CI images.
mistercrunch/airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,sekikn/incubator-airflow,Acehaidrey/incubator-airflow,cfei18/incubator-airflow,sekikn/incubator-airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,apache/incubator-airflow,Acehaidrey/incubator-airflow,bolkedebruin/airflow,dhuang/incubator-airflow,lyft/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,danielvdende/incubator-airflow,apache/airflow,apache/airflow,dhuang/incubator-airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,mistercrunch/airflow,apache/incubator-airflow,apache/airflow,mistercrunch/airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,Acehaidrey/incubator-airflow,apache/airflow,bolkedebruin/airflow,sekikn/incubator-airflow,Acehaidrey/incubator-airflow,bolkedebruin/airflow,apache/airflow,apache/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,apache/airflow,dhuang/incubator-airflow,lyft/incubator-airflow,danielvdende/incubator-airflow,apache/incubator-airflow,dhuang/incubator-airflow,cfei18/incubator-airflow,sekikn/incubator-airflow,mistercrunch/airflow,bolkedebruin/airflow,bolkedebruin/airflow