ci: Skip CodeCov upload for scheduled jobs (#3008)

To avoid failing CI jobs such as
https://github.com/getsentry/sentry-cocoa/actions/runs/4912764852/jobs/8772174301.

.github/workflows/test.yml

@@ -227,9 +227,10 @@ jobs:
  # See https://docs.codecov.io/docs/merging-reports
  # Checkout .codecov.yml to see the config of Codecov
  # We don't upload codecov for release branches, as we don't want a failing coverage check to block a release.
+ # We don't upload codecov for scheduled runs as CodeCov only accepts a limited amount of uploads per commit.
  - name: Push code coverage to codecov
  uses: codecov/codecov-action@894ff025c7b54547a9a2a1e9f228beae737ad3c2 # pin@v3.1.3
- if: ${{ contains(matrix.platform, 'iOS') && !contains(github.ref, 'release') }}
+ if: ${{ contains(matrix.platform, 'iOS') && !contains(github.ref, 'release') && github.event.schedule == '' }}
  with:
  # Although public repos should not have to specify a token there seems to be a bug with the Codecov GH action, which can
  # be solved by specifying the token, see https://github.com/codecov/codecov-action/issues/557#issuecomment-1224970469