Test, fix complex-valued TypeCast in PyOpenCL #3130

Job	Run time
Documentation	1m 49s
Tests for downstream project Firedrake	16m 33s
Tests for downstream project arraycontext	2m 43s
Tests for downstream project meshmode	10m 16s
Conda Examples	2m 6s
Flake8	21s
Tests for downstream project grudge	10m 13s
Mypy	1m 40s
Tests for downstream project pytential	49m 49s
Conda Pytest (ubuntu-latest)	3m 44s
Pylint	1m 58s
Conda Pytest with Intel CL	3m 44s
Tests for downstream project pytato	5m 32s
Conda Pytest (macos-latest)	3m 27s
Conda Pytest without arg check	3m 55s
Conda Pytest Twice (for cache behavior)	3m 48s
Validate CITATION.cff	6s
	2h 1m 44s

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