Implement CupyArrayContext #1806

Job	Run time
Typos	7s
Ruff	7s
Examples Conda Py3	1m 21s
Mypy	1m 55s
Pylint	1m 55s
Pytest Conda Py3 Intel	2m 5s
Pytest Conda Py3 POCL	2m 19s
Documentation	1m 48s
Tests for downstream project meshmode	11m 28s
Tests for downstream project grudge	9m 47s
Tests for downstream project mirgecom	3s
Tests for downstream project mirgecom_examples	3s
	32m 58s

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