_dag_to_transformed_pytato_prg: use _DEFAULT_LOOPY_OPTIONS #1353

Job	Run time
Pylint	5m 21s
Mypy	4m 46s
Documentation	5m 3s
Tests for downstream project meshmode	23m 6s
Tests for downstream project grudge	12m 54s
Tests for downstream project mirgecom	5s
Tests for downstream project mirgecom_examples	4s
Examples Conda Py3	5m 5s
Flake8	17s
Pytest Conda Py3 POCL	7m 12s
Pytest Conda Py3 Intel	5m 21s
	1h 9m 14s

Provide feedback