[Feature] Add MATLAB-like bicubic interpolation

[ckkelvinchan]

Motivation

Existing image and video SR methods commonly use the imresize function in MATLAB to generate LR images. It means that one would need MATLAB to generate such LR images.

Modification

This PR adds the Python version of the MATLAB imresize function.

Note:
There is a slight difference between the official MATLAB implementation and this implementation. For instance, when using BasicVSR on REDS4, we achieve the following results:

• Official MATLAB implementation: 31.4170/0.8909
• This implementation: 31.4206/0.8911

[innerlee]

One important thing is to be explicit about whether the implementation is the "same" as matlab's. From my point of view, this is a matlab-like resize. So some phrases in the docstring should be adjusted slightly to void giving a wrong impression.

[innerlee]

Also please rebase master to pass CI

[innerlee]

And give licence info if the code is adapted from elsewhere

[codecov]

Codecov Report

Merging #507 (2405775) into master (a408880) will increase coverage by 0.10%.
The diff coverage is 90.26%.

@@            Coverage Diff             @@
##           master     #507      +/-   ##
==========================================
+ Coverage   80.50%   80.60%   +0.10%     
==========================================
  Files         190      191       +1     
  Lines       10344    10457     +113     
  Branches     1533     1553      +20     
==========================================
+ Hits         8327     8429     +102     
- Misses       1789     1794       +5     
- Partials      228      234       +6     

Flag	Coverage Δ
unittests	80.57% <90.26%> (+0.10%)	⬆️

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Impacted Files	Coverage Δ
mmedit/datasets/pipelines/matlab_like_resize.py	90.17% <90.17%> (ø)
mmedit/datasets/pipelines/__init__.py	100.00% <100.00%> (ø)

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