[AIRFLOW-4073] add template_ext for AWS Athena operator (#4907)
[AIRFLOW-4073] add template_ext for AWS Athena operator (#4907)


dhuang/incubator-airflow,cfei18/incubator-airflow,wooga/airflow,bolkedebruin/airflow,lyft/incubator-airflow,apache/airflow,mrkm4ntr/incubator-airflow,nathanielvarona/airflow,cfei18/incubator-airflow,Fokko/incubator-airflow,DinoCow/airflow,nathanielvarona/airflow,mtagle/airflow,apache/incubator-airflow,bolkedebruin/airflow,bolkedebruin/airflow,r39132/airflow,cfei18/incubator-airflow,sekikn/incubator-airflow,cfei18/incubator-airflow,wooga/airflow,cfei18/incubator-airflow,mtagle/airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,DinoCow/airflow,airbnb/airflow,wooga/airflow,Acehaidrey/incubator-airflow,mrkm4ntr/incubator-airflow,spektom/incubator-airflow,airbnb/airflow,lyft/incubator-airflow,apache/airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,apache/incubator-airflow,airbnb/airflow,sekikn/incubator-airflow,airbnb/airflow,mistercrunch/airflow,bolkedebruin/airflow,wileeam/airflow,apache/airflow,r39132/airflow,lyft/incubator-airflow,apache/incubator-airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,r39132/airflow,wileeam/airflow,spektom/incubator-airflow,mrkm4ntr/incubator-airflow,danielvdende/incubator-airflow,mistercrunch/airflow,wooga/airflow,nathanielvarona/airflow,Acehaidrey/incubator-airflow,sekikn/incubator-airflow,Fokko/incubator-airflow,Fokko/incubator-airflow,dhuang/incubator-airflow,cfei18/incubator-airflow,danielvdende/incubator-airflow,sekikn/incubator-airflow,Acehaidrey/incubator-airflow,apache/airflow,lyft/incubator-airflow,spektom/incubator-airflow,wileeam/airflow,nathanielvarona/airflow,r39132/airflow,bolkedebruin/airflow,wileeam/airflow,danielvdende/incubator-airflow,danielvdende/incubator-airflow,mistercrunch/airflow,mtagle/airflow,dhuang/incubator-airflow,apache/airflow,spektom/incubator-airflow,DinoCow/airflow,nathanielvarona/airflow,Fokko/incubator-airflow,mistercrunch/airflow,DinoCow/airflow,mtagle/airflow,apache/airflow,apache/incubator-airflow,mrkm4ntr/incubator-airflow,dhuang/incubator-airflow