Add WithTransport to gcrane

[jonjohnsonjr]

Also add some silly tests for coverage.

[codecov-commenter]

Codecov Report

Merging #1022 (22d9e76) into main (4cdd086) will increase coverage by 0.15%.
The diff coverage is 92.00%.

@@            Coverage Diff             @@
##             main    #1022      +/-   ##
==========================================
+ Coverage   75.22%   75.37%   +0.15%     
==========================================
  Files         107      107              
  Lines        5053     5076      +23     
==========================================
+ Hits         3801     3826      +25     
+ Misses        706      704       -2     
  Partials      546      546              

Impacted Files	Coverage Δ
pkg/crane/options.go	90.47% <0.00%> (-9.53%)	⬇️
pkg/crane/catalog.go	100.00% <100.00%> (ø)
pkg/gcrane/options.go	100.00% <100.00%> (+22.22%)	⬆️
pkg/v1/remote/write.go	63.38% <100.00%> (+0.42%)	⬆️

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