Add 'sa-east-1' to list of supported regions.
Add 'sa-east-1' to list of supported regions.

prakharjain09/qds-sdk-py,adeshr/qds-sdk-py,msumit/qds-sdk-py,qubole/qds-sdk-py,vrajat/qds-sdk-py,tanishgupta1/qds-sdk-py-1