Improve type annotations in kernel.creation #3864

Job	Run time
Ruff	8s
Typos	7s
Conda Pytest (ubuntu-latest)	4m 30s
Conda Pytest without arg check	4m 41s
Conda Pytest with Intel CL	4m 13s
Tests for downstream project Firedrake	3m 30s
Conda Examples	2m 27s
basedpyright	2m 9s
Validate CITATION.cff	11s
Conda Pytest (macos-latest)	4m 40s
Documentation	2m 10s
Tests for downstream project pytato	9m 15s
Tests for downstream project pytential	9m 27s
Tests for downstream project meshmode	9m 29s
Tests for downstream project grudge	9m 28s
Conda Pytest Twice (for cache behavior)	4m 38s
Tests for downstream project arraycontext	3m 27s
	1h 14m 30s

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