Only run changelog request when status is not draft

[h-mayorquin]

As in the title.

@pauladkisson Here the idea is that the changelog check is only enforced when someone marks the PR as ready for review and from then onwards. This achieves the following which I find desirable:

• The PR should not be marked immediately as a failure as it is now when is on draft.
• PRs also change when they are in draft and the right point to write a changelog is when the PR is ready for review.
• It will save runners on the CI and currently, we are getting too little on them and waiting too long on our workflows.

[h-mayorquin]

OK, tests successfully skipped on draft:

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.40%. Comparing base (96c8ed4) to head (6f82350). Report is 1 commits behind head on main.

Additional details and impacted files

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