Add AnalyticBeam objects and a unified interface for UVBeams and AnalyticBeams #5309

Job	Run time
Run Tests (macos-latest, 3.10)	5m 46s
Run Tests (macos-latest, 3.11)	5m 54s
Run Tests (macos-latest, 3.12)	9m 48s
Run Tests (windows-latest, 3.10)	7m 33s
Run Tests (windows-latest, 3.11)	7m 41s
Run Tests (windows-latest, 3.12)	8m 43s
Run Tests (macos-13, 3.12, pyuvdata_tests)	21m 30s
	1h 6m 55s

Provide feedback