Use reviewed & unreverted edits as good for fiwiki (#112) * [WIP] Query and fetch changes approved through FlaggedRevs Bug: T166235 * [WIP] Improve flaggedrevs data set * Include 160k more approvals with legacy log_params. * Omit two bot users. * Omit anything autolabeled as reverted. * Only use approvals of a single commit, no chains. Introduces a new utility to filter by the value of a given json key. * Add the key data set for this experiment, for review. * Use reviewed & unreverted edits as good for fiwiki * Removes one-off scripts for fiwiki flaggedrevs.