Move archive plugin startup to archivecmd.Init()

[bep]

We don't need it when building.

[codecov-commenter]

Codecov Report

Merging #11 (f801861) into main (4405ed3) will increase coverage by 1.95%.
The diff coverage is 69.95%.

@@            Coverage Diff             @@
##             main      #11      +/-   ##
==========================================
+ Coverage   64.73%   66.68%   +1.95%     
==========================================
  Files          32       33       +1     
  Lines        1639     1741     +102     
==========================================
+ Hits         1061     1161     +100     
+ Misses        444      439       -5     
- Partials      134      141       +7     

Impacted Files	Coverage Δ
internal/archives/build.go	40.98% <ø> (+0.66%)	⬆️
internal/common/ioh/files.go	100.00% <ø> (ø)
internal/config/build_config.go	68.75% <ø> (ø)
internal/config/decode.go	73.10% <ø> (+2.70%)	⬆️
internal/config/release_config.go	45.45% <50.00%> (+5.45%)	⬆️
internal/releases/github.go	16.83% <50.00%> (+4.87%)	⬆️
cmd/releasecmd/release.go	64.66% <52.94%> (+2.24%)	⬆️
cmd/archivecmd/archive.go	78.32% <54.76%> (-10.94%)	⬇️
internal/config/archive_config.go	55.55% <62.50%> (+2.10%)	⬆️
main.go	64.78% <63.63%> (+1.29%)	⬆️
... and 14 more

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