task: Fix usages of api.AssetSpec.Storage field, now a ptr

[victorges]

Sometimes I hate go verbosity

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes are missing coverage. Please review.

Project coverage is 16.51270%. Comparing base (3d2a29a) to head (7cef519).

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main        #238         +/-   ##
===================================================
- Coverage   16.56051%   16.51270%   -0.04781%     
===================================================
  Files             16          16                 
  Lines           1727        1732          +5     
===================================================
  Hits             286         286                 
- Misses          1416        1421          +5     
  Partials          25          25                 

Files	Coverage Δ
task/runner.go	18.23899% <0.00000%> (-0.03832%)	⬇️
task/upload.go	15.82734% <0.00000%> (-0.11469%)	⬇️

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Files	Coverage Δ
task/runner.go	18.23899% <0.00000%> (-0.03832%)	⬇️
task/upload.go	15.82734% <0.00000%> (-0.11469%)	⬇️