Refactor mg symmetrize tests

[jnke2016]

This PR refactors and fixes mg symmetrize tests
closes #2277

[codecov-commenter]

Codecov Report

Merging #2278 (ab0bb5d) into branch-22.06 (046cbd2) will not change coverage.
The diff coverage is n/a.

❗ Current head ab0bb5d differs from pull request most recent head e1e4e99. Consider uploading reports for the commit e1e4e99 to get more accurate results

@@              Coverage Diff              @@
##           branch-22.06    #2278   +/-   ##
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  Coverage         63.97%   63.97%           
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  Files               100      100           
  Lines              4436     4436           
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  Hits               2838     2838           
  Misses             1598     1598           

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[betochimas]

I appreciate the updated testing refactoring, the main logic of the tests is intact with improved naming and relevant helpers. The debugging code if symmetrized edges aren't present also helps.

[alexbarghi-nv]

LGTM

[acostadon]

No recommendations here. looks great.

[BradReesWork]

@gpucibot merge