ci: Run coverage with GitHub actions

[nellh]

Use GitHub actions for coverage.

[codecov]

Codecov Report

Merging #2933 (1b18959) into master (fbd8afe) will increase coverage by 11.23%.
Report is 208 commits behind head on master.
The diff coverage is 63.87%.

❗ Current head 1b18959 differs from pull request most recent head 6d3ea52. Consider uploading reports for the commit 6d3ea52 to get more accurate results

@@             Coverage Diff             @@
##           master    #2933       +/-   ##
===========================================
+ Coverage   75.69%   86.93%   +11.23%     
===========================================
  Files         410      383       -27     
  Lines       67207    65030     -2177     
  Branches     2035     1122      -913     
===========================================
+ Hits        50874    56534     +5660     
+ Misses      16283     8490     -7793     
+ Partials       50        6       -44     

Files	Coverage Δ
.pnp.cjs	99.87% <ø> (+15.03%)	⬆️
...euro-app/src/scripts/authentication/admin-user.jsx	47.82% <100.00%> (ø)
...neuro-app/src/scripts/authentication/loginCheck.js	100.00% <100.00%> (ø)
...penneuro-app/src/scripts/authentication/profile.ts	91.17% <100.00%> (ø)
...uro-app/src/scripts/authentication/withProfile.jsx	52.63% <100.00%> (ø)
...-app/src/scripts/dataset/common/follow-toggles.tsx	100.00% <100.00%> (ø)
...s/openneuro-app/src/scripts/dataset/files/file.tsx	71.54% <100.00%> (+1.38%)	⬆️
.../scripts/dataset/files/viewers/file-viewer-csv.jsx	75.00% <100.00%> (ø)
.../scripts/dataset/files/viewers/file-viewer-tsv.jsx	75.00% <100.00%> (ø)
...rc/scripts/dataset/fragments/comments-fragments.js	100.00% <100.00%> (ø)
... and 60 more

... and 76 files with indirect coverage changes

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