[WIP] Add distributed inference for llama3.2 vision

[acisseJZhong]

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[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/torchtune/2328

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 60.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 64.40%. Comparing base (e6b9064) to head (44b7160).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
torchtune/training/_distributed.py	16.66%	5 Missing ⚠️
torchtune/models/llama3_2_vision/_parallelism.py	85.71%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2328       +/-   ##
===========================================
+ Coverage   23.72%   64.40%   +40.68%     
===========================================
  Files         361      357        -4     
  Lines       21492    20975      -517     
===========================================
+ Hits         5098    13509     +8411     
+ Misses      16394     7466     -8928     

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