fix: skaffold debug does not work for helm deployments with multiple …

[doriandekoning]

Fixes: #4826
Related:#4732
Merge before/after: None
Description
This mr splits the rendered helm resources in the skaffold filter command on --- which separates resources. Currently only the first resource is modified, this causes the debug command not to work. In this mr the input on filter (the rendered helm resources) is split on --- and to each resource the debugging transformations are applied.

I'd like to add some tests but there are currently no meaning full tests for the filter command (as far as I can see) which I can extend.

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[codecov]

Codecov Report

Merging #4827 into master will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #4827      +/-   ##
==========================================
- Coverage   71.72%   71.71%   -0.01%     
==========================================
  Files         353      353              
  Lines       12099    12100       +1     
==========================================
  Hits         8678     8678              
- Misses       2775     2776       +1     
  Partials      646      646              

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/filter.go	25.58% <0.00%> (-0.61%)	⬇️

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[briandealwis]

Thanks for catching this — I'll fix this up and add some further tests.