…ntation with torchmetric PSNR

- I replaced the self-implemented PSNR computation with the one provided by torchmetric. 
- The ordering of torchmetric function call arguments is actually predictions ("preds") and then target ("target"), not the other way around.

peak_signal_noise_ratio_eps with the initial PSNR implementation (using range and epsilon)

Additionally to the vanilla PSNR, also the PSNR based on value range and with epsilon in the denominator is now added to the overall_stats_dict as "psnr_range_eps"

Co-authored-by: Sarthak Pati <[email protected]>

Co-authored-by: Sarthak Pati <[email protected]>

I don't know why changing this comment broke the testing pipeline. Maybe it was not the comment. I changed the quotation marks hoping that would help (probably does not though...)

Now the code should be in the state when it last worked

I do not know why the pipeline fails To me it seems unrelated to the changes that were made since the last successful run.