Update jib to 2.7.1

[loosebazooka]

Update examples and testdata for latest jib release.

[chanseokoh]

FYI #5119 (comment)

But should be OK.

[loosebazooka]

I vaguely recall some comment to the contrary, but I'll just follow the latest comment just to be sure... I'll undo the changes in examples.

[codecov]

Codecov Report

Merging #5223 (acb0a7a) into master (95092ad) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5223      +/-   ##
==========================================
+ Coverage   71.84%   71.87%   +0.02%     
==========================================
  Files         387      387              
  Lines       13974    13974              
==========================================
+ Hits        10040    10044       +4     
+ Misses       3195     3193       -2     
+ Partials      739      737       -2     

Impacted Files	Coverage Δ
pkg/skaffold/util/tar.go	56.00% <0.00%> (+5.33%)	⬆️

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[briandealwis]

Thanks!

[briandealwis]

We can change the examples too since they shouldn't cause break the latest version of Skaffold.

[briandealwis]

Just read @tejal29's comment. Will bring it up for discussion.