diffusers

41509333 - Fix the total_downscale_factor returned by FullAdapterXL T2IAdapters (#5134)

Fix the total_downscale_factor returned by FullAdapterXL T2IAdapters (#5134) * Fix FullAdapterXL.total_downscale_factor. * Fix incorrect error message in T2IAdapter.__init__(...). * Move IP-Adapter test_total_downscale_factor(...) to pipeline test file (requested in code review). * Add more info to error message about an unsupported T2I-Adapter adapter_type. --------- Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>