Implement CupyArrayContext #1707

Job	Run time
Examples Conda Py3	1m 25s
Documentation	1m 48s
Tests for downstream project meshmode	11m 45s
Mypy	2m 6s
Tests for downstream project grudge	10m 4s
Pylint	1m 53s
Pytest Conda Py3 Intel	2m 2s
Tests for downstream project mirgecom	5s
Pytest Conda Py3 POCL	2m 16s
Tests for downstream project mirgecom_examples	2s
Ruff	5s
Typos	3s
	33m 34s

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