Implement CupyArrayContext #1666

Job	Run time
Documentation	1m 52s
Examples Conda Py3	1m 26s
Tests for downstream project meshmode	12m 35s
Mypy	1m 42s
Tests for downstream project grudge	10m 39s
Pylint	1m 51s
Tests for downstream project mirgecom	5s
Pytest Conda Py3 Intel	2m 14s
Tests for downstream project mirgecom_examples	5s
Pytest Conda Py3 POCL	2m 33s
Ruff	5s
Typos	4s
	35m 11s

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