Simplify float, int power function #2998

Job	Run time
Flake8	30s
Tests for downstream project Firedrake	18m 0s
Documentation	2m 48s
Tests for downstream project arraycontext	3m 57s
Conda Pytest (ubuntu-latest)	6m 0s
Conda Examples	3m 22s
Tests for downstream project meshmode	21m 39s
Conda Pytest (macos-latest)	6m 11s
Mypy	2m 47s
Tests for downstream project grudge	11m 39s
Tests for downstream project pytential	48m 27s
Conda Pytest without arg check	6m 10s
Tests for downstream project pytato	10m 25s
Conda Pytest Twice (for cache behavior)	8m 50s
Pylint	4m 13s
Conda Pytest with Intel CL	6m 43s
	2h 41m 41s

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