Bump schema version to v2beta19

[nkubala]

No description provided.

[codecov]

Codecov Report

Merging #6116 (6b6b6ec) into master (1f46f24) will decrease coverage by 0.15%.
The diff coverage is 27.02%.

@@            Coverage Diff             @@
##           master    #6116      +/-   ##
==========================================
- Coverage   70.15%   69.99%   -0.16%     
==========================================
  Files         475      477       +2     
  Lines       18191    18268      +77     
==========================================
+ Hits        12761    12786      +25     
- Misses       4487     4536      +49     
- Partials      943      946       +3     

Impacted Files	Coverage Δ
pkg/skaffold/schema/latest/v1/config.go	58.82% <ø> (ø)
pkg/skaffold/schema/v2beta17/upgrade.go	100.00% <ø> (ø)
pkg/skaffold/schema/versions.go	83.20% <ø> (ø)
pkg/skaffold/schema/v2beta18/config.go	20.58% <20.58%> (ø)
pkg/skaffold/schema/v2beta18/upgrade.go	100.00% <100.00%> (ø)
pkg/skaffold/docker/parse.go	86.19% <0.00%> (-0.96%)	⬇️
pkg/skaffold/event/v2/metadata.go	89.18% <0.00%> (+0.45%)	⬆️
pkg/skaffold/util/tar.go	56.00% <0.00%> (+5.33%)	⬆️

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