HACK ci: Use dependent steps instead of wait for codecov

Created by: keegancsmith

This hacks in using depends_on and key to upload test coverage. It uses global state, so we probably want to avoid that. In fact, we probably want to not go with this approach at all given it requires dynamic generation of keys/etc.

Created by: keegancsmith

Found this PR, so this is an alternative !6918 (closed)

Created by: keegancsmith

With !6987 (merged) this is unlikely to be that useful, so just gonna close this out.

Created by: codecov[bot]

Codecov Report

Merging #7011 into master will increase coverage by <.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #7011      +/-   ##
==========================================
+ Coverage   39.23%   39.23%   +<.01%     
==========================================
  Files        1230     1230              
  Lines       63493    63493              
  Branches     6041     6041              
==========================================
+ Hits        24910    24912       +2     
+ Misses      36300    36298       -2     
  Partials     2283     2283

Impacted Files	Coverage Δ
cmd/frontend/graphqlbackend/repository.go	21.65% <0%> (+0.92%)