_get_scalar_func_loopy_program: Allow offsets in GlobalArgs #1351

Job	Run time
Examples Conda Py3	4m 32s
Flake8	21s
Documentation	5m 10s
Tests for downstream project meshmode	22m 28s
Tests for downstream project grudge	13m 41s
Tests for downstream project mirgecom	3s
Tests for downstream project mirgecom_examples	4s
Mypy	5m 38s
Pylint	4m 43s
Pytest Conda Py3 Intel	5m 41s
Pytest Conda Py3 POCL	7m 36s
	1h 9m 57s

Provide feedback