Tree: various speedups #3342

Job	Run time
Ruff	6s
Mypy	1m 32s
Tests for downstream project Firedrake	4m 9s
Tests for downstream project arraycontext	2m 27s
Documentation	1m 24s
Conda Examples	1m 54s
Tests for downstream project meshmode	4m 22s
Tests for downstream project grudge	4m 22s
Pylint	1m 33s
Conda Pytest (ubuntu-latest)	3m 57s
Tests for downstream project pytential	4m 22s
Conda Pytest with Intel CL	3m 54s
Conda Pytest (macos-latest)	4m 3s
Tests for downstream project pytato	4m 23s
Conda Pytest without arg check	3m 50s
Conda Pytest Twice (for cache behavior)	4m 22s
Typos	4s
Validate CITATION.cff	10s
	50m 54s

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