Use XLA utility API to move data to CPU (Single TPU core)

[kaushikb11]

What does this PR do?

Use XLA utility API to move data to CPU

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[codecov]

Codecov Report

Merging #8078 (7e9d779) into master (5d44e61) will decrease coverage by 5%.
The diff coverage is 64%.

@@           Coverage Diff           @@
##           master   #8078    +/-   ##
=======================================
- Coverage      92%     87%    -5%     
=======================================
  Files         210     210            
  Lines       13593   13599     +6     
=======================================
- Hits        12466   11827   -639     
- Misses       1127    1772   +645     

[tchaton]

LGMT !