Disable update check and survey prompt in non-interactive mode

[dgageot]

Fixes #4506

[codecov]

Codecov Report

Merging #4508 into master will decrease coverage by 0.00%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master    #4508      +/-   ##
==========================================
- Coverage   72.36%   72.35%   -0.01%     
==========================================
  Files         333      333              
  Lines       12956    12959       +3     
==========================================
+ Hits         9376     9377       +1     
- Misses       2982     2984       +2     
  Partials      598      598              

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/cmd.go	66.17% <33.33%> (-0.75%)	⬇️

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[dgageot]

Let me try to add a test

[dgageot]

In fact, it's a part of the code that's hard to test and the test wouldn't really add much value. Let's merge like this