change propeller compiler test

[wild-endeavor]

Update how the propeller compile test works.

• Removed all yaml files.
• Commented out the branch directory test since walking through it, it didn't actually do anything. Leaving it there as a comment for now.
• Some of the tests were literally testing for what encoding: provide canonical output format golang/protobuf#1121 advises against testing for. That is, we were serializing proto objects to yaml and checking that they string matched the saved yaml files. Removed these tests (which is also why the yaml files were deleted.)
• However, since it's possible to unmarshal from json, we can use the existing json files to reconstruct a proto object and do a proto equals.
• The last check at the bottom of the loop however is not a proto file, it's the Flyte workflow crd, so convert to a new json file, and then make the tester compare strings where multiple spaces have all been converted to one space.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (buf-experiment@00ab086). Click here to learn what that means.

Additional details and impacted files

@@                Coverage Diff                @@
##             buf-experiment    #4823   +/-   ##
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  Coverage                  ?   59.76%           
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  Files                     ?      462           
  Lines                     ?    37273           
  Branches                  ?        0           
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  Hits                      ?    22278           
  Misses                    ?    13323           
  Partials                  ?     1672           

Flag	Coverage Δ
unittests	59.76% <0.00%> (?)

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