Only report one test coverage per workflow

[st0012]

Currently every CI job sends a coverage report to codecov, which generates about 40 reports per CI run. This makes CI's status highly depend on codecov's because if it can't accept a report request (due to server issue...etc.), it fails the CI job.

[codecov-commenter]

Codecov Report

Merging #1567 (8ed2aa6) into master (5e18f60) will increase coverage by 0.21%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1567      +/-   ##
==========================================
+ Coverage   97.92%   98.13%   +0.21%     
==========================================
  Files         222      126      -96     
  Lines       10871     6916    -3955     
==========================================
- Hits        10645     6787    -3858     
+ Misses        226      129      -97     

Impacted Files	Coverage Δ
...rumbs/monotonic_active_support_breadcrumbs_spec.rb	29.41% <0.00%> (-23.53%)	⬇️
...ls/lib/sentry/rails/tracing/abstract_subscriber.rb	80.76% <0.00%> (-15.39%)	⬇️
sentry-rails/app/jobs/sentry/send_event_job.rb	73.33% <0.00%> (-14.17%)	⬇️
...ntry-ruby/lib/sentry/core_ext/object/duplicable.rb	60.00% <0.00%> (-10.22%)	⬇️
sentry-rails/lib/sentry/rails/railtie.rb	95.08% <0.00%> (-1.64%)	⬇️
sentry-rails/lib/sentry/rails/active_job.rb	97.14% <0.00%> (-0.23%)	⬇️
sentry-ruby/lib/sentry/interfaces/request.rb	95.16% <0.00%> (-0.16%)	⬇️
sentry-ruby/lib/sentry/rack/capture_exceptions.rb	95.00% <0.00%> (-0.13%)	⬇️
...iq/lib/sentry/sidekiq/sentry_context_middleware.rb	96.77% <0.00%> (-0.11%)	⬇️
sentry-ruby/lib/sentry/transport.rb	98.33% <0.00%> (-0.08%)	⬇️
... and 132 more

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[st0012]

@BYK I want to rename workflow names so they can provide more information about the job. Can you help me cancel the PR check for a while so I can merge this PR?

[BYK]

Will do tomorrow :)