[0.8] Implement optimized BF16 support for ARM architecture - [MOD-9079]

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Description

Backport of #623 to 0.8.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.94%. Comparing base (95bef4e) to head (2cda111). Report is 1 commits behind head on 0.8.

Additional details and impacted files

@@           Coverage Diff           @@
##              0.8     #641   +/-   ##
=======================================
  Coverage   96.94%   96.94%           
=======================================
  Files          91       91           
  Lines        5069     5069           
=======================================
  Hits         4914     4914           
  Misses        155      155           

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