Add autoformat workflow

[lu-wang-dl]

Based on: https://github.com/marketplace/actions/autoyapf

[codecov-commenter]

Codecov Report

Base: 95.58% // Head: 95.58% // No change to project coverage :thumbsup:

Coverage data is based on head (c5cf8bd) compared to base (cbd8738). Patch has no changes to coverable lines.

:exclamation: Current head c5cf8bd differs from pull request most recent head d9176ba. Consider uploading reports for the commit d9176ba to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #116   +/-   ##
=======================================
  Coverage   95.58%   95.58%           
=======================================
  Files          26       26           
  Lines         884      884           
=======================================
  Hits          845      845           
  Misses         39       39           

Flag	Coverage Δ
unittests	95.58% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...untime/databricks/automl_runtime/forecast/utils.py	100.00% <ø> (ø)

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