[DeepSpeed] Do not fail if batch size could not be inferred for logging

[SeanNaren]

What does this PR do?

Closes #10437

Adds a try/catch and a check to ensure we only warn if needs be (if logging has been set lower than WARNING).

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[codecov]

Codecov Report

Merging #10438 (7d9dd6f) into master (4117028) will increase coverage by 49%.
The diff coverage is 100%.

❗ Current head 7d9dd6f differs from pull request most recent head 71d65a6. Consider uploading reports for the commit 71d65a6 to get more accurate results

@@            Coverage Diff            @@
##           master   #10438     +/-   ##
=========================================
+ Coverage      43%      92%    +49%     
=========================================
  Files         178      178             
  Lines       16238    16276     +38     
=========================================
+ Hits         6937    14937   +8000     
+ Misses       9301     1339   -7962