Add kpt v1.0.0-alpha.2 to Skaffold image

[nkubala]

No description provided.

[codecov]

Codecov Report

Merging #5825 (c31e066) into master (b889708) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5825      +/-   ##
==========================================
- Coverage   71.03%   71.01%   -0.02%     
==========================================
  Files         440      440              
  Lines       16562    16562              
==========================================
- Hits        11764    11761       -3     
- Misses       3935     3936       +1     
- Partials      863      865       +2     

Impacted Files	Coverage Δ
pkg/skaffold/docker/image.go	78.34% <0.00%> (-1.39%)	⬇️

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[nkubala]

@yuwenma FYI

[yuwenma]

oh, this is really sweet! Thank you.