Post an information message about automatic update of MR title when the MR adds/removes a feature flag
After !52814 (merged) got merged, I realized that Danger wouldn't post the information message about the title update, because after updating the title, it creates a new pipeline, which immediately cancels the current pipeline (including the danger-review
job itself), thus the message that it should have posted is never posted.
We should improve that so that an information message is posted when the title includes the [RUN ALL RSPEC] [RUN AS-IF-FOSS]
flags (so after the title was updated).