[docs] RandomResizeCrop signature quirks

1. Why do we need to have so much precision: 1.333333333333? 1.3 would suffice and be more readable
2. <InterpolationMode.BILINEAR: 'bilinear'>. It's not clear from this if the enum should be preferred or the constant (and it's also not copy-pastable in the code). It's also not clear which type is used for InterpolationMode, especially given that for a long time only PIL.Image.InterpolationMode was supported, hence even new codebases are using the legacy PIL types: https://github.com/facebookresearch/dino/blob/58aabc0/main_dino.py#L420
3. Why does InterpolationMode live in torchvision.transforms.functional whereas the type using it lives in torchvision.transforms? This enum is basic enough to deserve placement in torchvision.transforms directly IMHO.
4. The doc text mentions torchvision.transforms.InterpolationMode, but it's incorrect since the type currently lives in transforms.functional: https://pytorch.org/vision/master/transforms.html?highlight=randomresizedcrop#torchvision.transforms.functional.InterpolationMode

Start with the RandomResizeCrop and InterpolationMode entries in the linked torchvision transforms documentation, then inspect the current references to torchvision.transforms.functional and torchvision.transforms. Compare the rendered signature and enum representation with the issue's four concerns. Done means the precision, preferred enum usage, type information, enum location, and documentation link are resolved consistently.