Give v2 proto different package name

[MarlonGamez]

Related: #5368

Description
Gives the v2 proto package a new name. This is to prevent issues that arise from both v1 and v2 trying to register protos with the same name in the same package

[codecov]

Codecov Report

Merging #5557 (0039b13) into master (116201a) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5557      +/-   ##
==========================================
+ Coverage   71.28%   71.30%   +0.02%     
==========================================
  Files         400      400              
  Lines       14971    14987      +16     
==========================================
+ Hits        10672    10687      +15     
+ Misses       3512     3510       -2     
- Partials      787      790       +3     

Impacted Files	Coverage Δ
pkg/skaffold/docker/image.go	78.13% <0.00%> (-1.40%)	⬇️
pkg/skaffold/instrumentation/export.go	77.27% <0.00%> (-0.18%)	⬇️
cmd/skaffold/app/cmd/build.go	89.74% <0.00%> (ø)
cmd/skaffold/app/cmd/version.go	85.71% <0.00%> (ø)
pkg/skaffold/runner/changeset.go	77.77% <0.00%> (ø)
pkg/skaffold/runner/timings.go	95.34% <0.00%> (+0.22%)	⬆️
pkg/skaffold/runner/dev.go	72.04% <0.00%> (+0.52%)	⬆️
pkg/skaffold/event/event.go	91.47% <0.00%> (+0.69%)	⬆️
cmd/skaffold/app/cmd/flags.go	88.88% <0.00%> (+0.95%)	⬆️
pkg/skaffold/errors/errors.go	89.36% <0.00%> (+2.12%)	⬆️

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[nkubala]

LGTM with one comment