NEW: wandb log to logger

[martins0n]

Before submitting (must do checklist)

• Did you read the contribution guide?
• Did you update the docs? We use Numpy format for all the methods and classes.
• Did you write any new necessary tests?
• Did you update the CHANGELOG?

Proposed Changes

Closing issues

[github-actions]

🚀 Deployed on https://deploy-preview-816--etna-docs.netlify.app

[codecov-commenter]

Codecov Report

Merging #816 (858dc3f) into master (66027b9) will increase coverage by 0.26%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #816      +/-   ##
==========================================
+ Coverage   84.07%   84.34%   +0.26%     
==========================================
  Files         126      126              
  Lines        7236     7237       +1     
==========================================
+ Hits         6084     6104      +20     
+ Misses       1152     1133      -19     

Impacted Files	Coverage Δ
etna/loggers/wandb_logger.py	57.31% <100.00%> (+23.98%)	⬆️

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