Add Workflow data extraction pipeline
What does this merge request do and why?
This MR adds a data extraction pipeline to build datasets for Workflow's pipeline fixing feature.
The script pages through merged MRs for the given projects to find pairs of failed-fixed pipelines.
Relates to #362
Closes #383
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
Merge request checklist
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I've ran the affected pipeline(s) to validate that nothing is broken. -
Tests added for new functionality. If not, please raise an issue to follow up. -
Documentation added/updated, if needed.