Implement CupyArrayContext #1705

Job	Run time
Ruff	5s
Documentation	1m 42s
Tests for downstream project meshmode	11m 56s
Mypy	2m 3s
Tests for downstream project grudge	10m 6s
Tests for downstream project mirgecom	2s
Pylint	1m 53s
Tests for downstream project mirgecom_examples	2s
Pytest Conda Py3 Intel	2m 1s
Examples Conda Py3	1m 25s
Pytest Conda Py3 POCL	2m 25s
Typos	3s
	33m 43s

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