Revert changes in logit size for semantic segmentation models
# What does this PR do?

This PR reverts the changes made in the size of the returned logits of semantic segmentation models made in #15469 because it leads in some situations to two consecutive resizes:
- one to resize the output to the same size of the input
- one to resize the output to the size of the original image
Two different interpolations with nearest neighbors is a bad idea and users will get a best result by just doing one interpolation to get the segmentation mask to the size they want.

This restores backward compatibility, but still introduces a new argument `resize_logits` for situations where the user wants the logits the same size as the `pixel_values` passed to the model.
_The documentation is not available anymore as the PR was closed or merged._