(torchx/CI) update docker repo to ghcr.io/meta-pytorch/torchx

[kiukchung]

Summary: Updating container registry to point to meta-pytorch after the repo migration from pytorch/torchx to meta-pytorch/torchx

Reviewed By: AbishekS

Differential Revision: D83688082

[facebook-github-bot]

@kiukchung has exported this pull request. If you are a Meta employee, you can view the originating Diff in D83688082.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.65%. Comparing base (3b5df3a) to head (2aef0b5).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1136   +/-   ##
=======================================
  Coverage   91.65%   91.65%           
=======================================
  Files          83       83           
  Lines        6422     6422           
=======================================
  Hits         5886     5886           
  Misses        536      536           

Flag	Coverage Δ
unittests	91.65% <ø> (ø)

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