EulerAncestral add `rescale_betas_zero_snr` #16445

Job	Run time
Hub tests for models, schedulers, and pipelines	1m 53s
Fast PyTorch Pipeline CPU tests	13m 37s
Fast PyTorch Models & Schedulers CPU tests	3m 29s
LoRA	2m 8s
Fast Flax CPU tests	5m 9s
PyTorch Example CPU tests	6m 3s
	32m 19s

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