Fix torch bfloat import version

[SeanNaren]

What does this PR do?

Create a separate check for bfloat as current check does not allow people who use nightly to use bfloat precision.

Related #9049

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[tchaton]

LGMT !

[codecov]

Codecov Report

Merging #9089 (56745b6) into master (81145ca) will increase coverage by 4%.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master   #9089    +/-   ##
=======================================
+ Coverage      88%     92%    +4%     
=======================================
  Files         178     178            
  Lines       14694   14695     +1     
=======================================
+ Hits        12917   13527   +610     
+ Misses       1777    1168   -609