Fix speed of yarn installation (#19697)
Fix speed of yarn installation (#19697)

The --network-concurrency=1 is very slow and even if this has
been added in #17293 to battle connection refused, it slows regular
builds far too much.

There is a new optimisation in progress that should significantly
reduce the yarn installations on kind-cluster deploy: #19210 and
it should solve the problem much better.
bolkedebruin/airflow,lyft/incubator-airflow,apache/airflow,mistercrunch/airflow,mistercrunch/airflow,apache/airflow,cfei18/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,mistercrunch/airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,apache/airflow,cfei18/incubator-airflow,bolkedebruin/airflow,Acehaidrey/incubator-airflow,lyft/incubator-airflow,bolkedebruin/airflow,apache/airflow,cfei18/incubator-airflow,apache/airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,nathanielvarona/airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,bolkedebruin/airflow,Acehaidrey/incubator-airflow,bolkedebruin/airflow,nathanielvarona/airflow,Acehaidrey/incubator-airflow,cfei18/incubator-airflow,lyft/incubator-airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,apache/airflow,mistercrunch/airflow