ci: add coverage

[hugocaillard]

Description

[codecov]

Codecov Report

Merging #1241 (7eafe20) into develop (a2a21d8) will decrease coverage by 13.27%.
Report is 1200 commits behind head on develop.
The diff coverage is 7.67%.

@@             Coverage Diff              @@
##           develop    #1241       +/-   ##
============================================
- Coverage    34.02%   20.76%   -13.27%     
============================================
  Files          180       78      -102     
  Lines        47486    23784    -23702     
============================================
- Hits         16158     4939    -11219     
+ Misses       31328    18845    -12483     

Flag	Coverage Δ
unittests	20.76% <7.67%> (-13.27%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
components/clarinet-cli/src/bin.rs	0.00% <ø> (-25.00%)	⬇️
components/clarinet-cli/src/deployments/ui/app.rs	0.00% <ø> (ø)
components/clarinet-cli/src/deployments/ui/mod.rs	0.00% <ø> (ø)
components/clarinet-cli/src/generate/changes.rs	0.00% <ø> (ø)
components/clarinet-cli/src/generate/mod.rs	0.00% <ø> (ø)
...ents/clarinet-deployments/src/diagnostic_digest.rs	0.00% <ø> (ø)
components/clarinet-deployments/src/lib.rs	55.55% <ø> (+10.72%)	⬆️
...inet-deployments/src/onchain/bitcoin_deployment.rs	0.00% <ø> (ø)
components/clarinet-deployments/src/onchain/mod.rs	0.00% <ø> (ø)
...omponents/clarinet-deployments/src/requirements.rs	58.40% <ø> (+58.39%)	⬆️
... and 36 more

... and 89 files with indirect coverage changes

[hugocaillard]

@CharlieC3
I added back the the codecov report on the "old" ci.
Unfortunately, we are still not using the new, faster version (which should be even faster now that we removed Deno).

But now that this repo is in a more stable state (post clarinet v2 release), it'll make more sense to work on a clean CI and workflow.
Reporting the coverage is part of that

[CharlieC3]

Seems fine to me! I don't necessarily like that we have to duplicate more workflow logic. I'm not suggesting we do anything about it right now, but eventually I would like this project to migrate to the "component" workflows.

[hugocaillard]

Thanks @CharlieC3
Indeed, switching to the "new" CI should be a Q4 focus