Push/pull CNAB bundles

[simonferquel]

This leverages cnab-to-oci to push and pull built bundles. This also introduce a local bundle store to avoid network round-trips when doing multiple actions on the same bundle referenced using a registry ref.

[simonferquel]

We have now Push and Resolve registry references implemented. From there we will split Work with @ijc:

• I will handle e2e tests update (and tackle insecure registries support on the way)
• @ijc will handle Pulling to a local store

Will merge back to this branch once we're done

[codecov[bot]]

Codecov Report

Merging #466 into master will increase coverage by 6.87%. The diff coverage is 67.37%.

@@            Coverage Diff             @@
##           master     #466      +/-   ##
==========================================
+ Coverage   64.36%   71.24%   +6.87%     
==========================================
  Files          53       50       -3     
  Lines        3062     2438     -624     
==========================================
- Hits         1971     1737     -234     
+ Misses        848      474     -374     
+ Partials      243      227      -16

Impacted Files	Coverage Δ
cmd/docker-app/main.go	44.44% <0%> (-5.56%)	:arrow_down:
internal/packager/extract.go	62.5% <0%> (-2.81%)	:arrow_down:
cmd/docker-app/root.go	100% <100%> (+7.14%)	:arrow_up:
cmd/docker-app/bundle.go	66.07% <100%> (-2.68%)	:arrow_down:
cmd/docker-app/install.go	65.07% <100%> (-6.01%)	:arrow_down:
cmd/docker-app/cnab.go	64.04% <27.27%> (-16.7%)	:arrow_down:
cmd/docker-app/push.go	65.43% <61.64%> (-4.97%)	:arrow_down:
cmd/docker-app/upgrade.go	65.3% <66.66%> (-4.54%)	:arrow_down:
internal/store/store.go	71.42% <71.42%> (ø)	:arrow_up:
cmd/docker-app/pull.go	80% <73.33%> (+16%)	:arrow_up:
... and 10 more

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[simonferquel]

I can't understand why I have a vendoring issue here... tried with wsl to do make vendor, and git diff reports nothing changed :(

[simonferquel]

Closing in favor of #470 (keeping the branch alive for commit + comments history)