[Refactor] Move log stream utility out of pkg/skaffold/kubernetes

[nkubala]

Related: #6107

This moves the StreamRequest method out of pkg/skaffold/kubernetes so it can be used by other Logger implementations.

[codecov]

Codecov Report

Merging #6121 (4d16ad3) into master (fe12a8a) will decrease coverage by 0.00%.
The diff coverage is 22.72%.

@@            Coverage Diff             @@
##           master    #6121      +/-   ##
==========================================
- Coverage   69.96%   69.96%   -0.01%     
==========================================
  Files         477      478       +1     
  Lines       18283    18286       +3     
==========================================
+ Hits        12792    12794       +2     
- Misses       4545     4547       +2     
+ Partials      946      945       -1     

Impacted Files	Coverage Δ
pkg/skaffold/kubernetes/logger/log.go	38.29% <0.00%> (+1.69%)	⬆️
pkg/skaffold/log/stream/stream.go	23.80% <23.80%> (ø)
pkg/skaffold/docker/parse.go	86.19% <0.00%> (-0.96%)	⬇️
pkg/skaffold/util/tar.go	56.00% <0.00%> (+5.33%)	⬆️

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