Add sparse matrix interface #2010

Job	Run time
Ruff	9s
basedpyright	2m 13s
Typos	7s
Pytest Conda Py3 Intel	2m 34s
Examples Conda Py3	1m 59s
Pytest Conda Py3 POCL	3m 20s
Documentation	2m 20s
Tests for downstream project mirgecom	4s
Tests for downstream project mirgecom_examples	7s
Tests for downstream project grudge	11m 54s
Tests for downstream project meshmode	11m 18s
	36m 5s

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