Implement CupyArrayContext #1721

Job	Run time
Mypy	3m 23s
Documentation	3m 9s
Examples Conda Py3	2m 48s
Tests for downstream project meshmode	12m 56s
Tests for downstream project grudge	11m 21s
Pylint	3m 16s
Pytest Conda Py3 Intel	3m 30s
Tests for downstream project mirgecom	3s
Pytest Conda Py3 POCL	3m 56s
Tests for downstream project mirgecom_examples	5s
Ruff	9s
Typos	4s
	44m 40s

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