🐛 fix kubectl apply error handling

[pyaillet]

Hi !

Thanks for skaffold it's a really nice project !

I gave a try at fixing #1738 😄

Thanks to @charlyx for his help 🤗

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 56.11%. Comparing base (25f1b66) to head (5643ce0).

Files with missing lines	Patch %	Lines
pkg/skaffold/deploy/kustomize.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2076      +/-   ##
==========================================
- Coverage   56.12%   56.11%   -0.01%     
==========================================
  Files         180      180              
  Lines        7753     7755       +2     
==========================================
+ Hits         4351     4352       +1     
- Misses       2986     2987       +1     
  Partials      416      416              

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