Add retry to get OpenAI embeddings

[zechengz]

Allow multiple times retry to get OpenAI embeddings if some requests failed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.52%. Comparing base (c1f0cb8) to head (f8498cd).

❗ Current head f8498cd differs from pull request most recent head e09f99d. Consider uploading reports for the commit e09f99d to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #378      +/-   ##
==========================================
- Coverage   93.52%   93.52%   -0.01%     
==========================================
  Files         124      124              
  Lines        6454     6451       -3     
==========================================
- Hits         6036     6033       -3     
  Misses        418      418              

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