[Feature] Add LIIF-RDN

[Yshuo-Li]

No description provided.

[codecov]

Codecov Report

Merging #428 (68d2525) into liif (29cf572) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             liif     #428      +/-   ##
==========================================
+ Coverage   80.85%   80.91%   +0.05%     
==========================================
  Files         189      189              
  Lines       10107    10127      +20     
  Branches     1485     1487       +2     
==========================================
+ Hits         8172     8194      +22     
+ Misses       1721     1720       -1     
+ Partials      214      213       -1     

Flag	Coverage Δ
unittests	80.88% <100.00%> (+0.04%)	⬆️

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Impacted Files	Coverage Δ
mmedit/models/backbones/sr_backbones/liif_net.py	88.14% <100.00%> (+2.06%)	⬆️
...ls/components/stylegan2/generator_discriminator.py	86.14% <0.00%> (+1.20%)	⬆️

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[innerlee]

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