test: add gpu test for set embedding

[bwanglzu]

#163 (comment)

1. add gpu test for set_embeddings.
2. fix pytorch error, model not placed to gpu device.

[codecov]

Codecov Report

Merging #164 (61ffa3b) into main (43480cc) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #164      +/-   ##
==========================================
+ Coverage   85.70%   85.71%   +0.01%     
==========================================
  Files          25       25              
  Lines        1189     1190       +1     
==========================================
+ Hits         1019     1020       +1     
  Misses        170      170              

Flag	Coverage Δ
finetuner	85.71% <100.00%> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
finetuner/embedding.py	100.00% <100.00%> (ø)

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