Revert "Remove outdated CC_TEST_REPORTER_ID from GitHub tests"

We still need this variable for CodeCov.

Reverts 74f00b94

.github/workflows/ci.yml

@@ -72,6 +72,7 @@ jobs:
       - name: Run tests
         env:
           RAILS_ENV: test
+          CC_TEST_REPORTER_ID: true
         run: bundle exec rspec --color --format RSpec::Github::Formatter --format progress --require spec_helper --require rails_helper
 
       - name: Upload coverage reports to Codecov