Refactor CI builds and conda management #249

Job	Run time
Non-JIT test coverage	1m 21s
Vanilla Python 3.10 on ubuntu-latest	1m 20s
Demos, Examples, and Docs	36s
Vanilla Python 3.10 on macos-latest	1m 23s
Conda Python 3.10 on ubuntu-latest	1m 20s
Vanilla Python 3.10 on windows-latest	25s
Minimal dependency tests	1m 21s
Conda Python 3.10 on macos-latest	1m 22s
Vanilla Python 3.11 on ubuntu-latest	1m 21s
Conda Python 3.10 on windows-latest	1m 5s
Vanilla Python 3.11 on macos-latest	1m 22s
Conda Python 3.10 on macos-13	1m 12s
Vanilla Python 3.11 on windows-latest	25s
Conda Python 3.11 on ubuntu-latest	1m 19s
Conda Python 3.11 on macos-latest	1s
Conda Python 3.11 on windows-latest	1m 2s
Conda Python 3.11 on macos-13	1m 8s
Test suite results	1s
	18m 4s

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