Complete the `set_category()` purge

Following the merge of !395 (merged), this completes the removal of set_category() per e967f81f.

• Purges it from the core option set.
• Purges it from plugins.
• Purges all remaining artefacts (bumps the plugin API in doing so).

added MRStatus::NotCompliant label

added MRStatus::Reviewable label and removed MRStatus::NotCompliant label

added MRStatus::Acceptable label and removed MRStatus::Reviewable label

added MRStatus::NotCompliant label and removed MRStatus::Acceptable label

added 56 commits

• 92f84837...d66a2260 - 53 commits from branch videolan:master
• f49dbec5 - core: purge set_category()
• c495e0b0 - plugins: purge use of set_category()
• d8612d2c - purge remaining set_category() artifacts

Compare with previous version

added MRStatus::Acceptable label and removed MRStatus::NotCompliant label

added MRStatus::Accepted label and removed MRStatus::Acceptable label

MR Acceptance result

This MergeRequest has been Accepted! Congratulations.

MR acceptance checks details:

• MR should be considered mergeable by Gitlab
• Last pipeline should be successful
• MergeRequest should have at least one external review and/or vote
• All threads should be resolved, have votes and score > 0
• MergeRequest should have no activity (threads/votes) for (72h/72h)

This message was automatically generated by homer-bot.

added 7 commits

• d8612d2c...0a4cab0e - 4 commits from branch videolan:master
• 41af39c4 - core: purge set_category()
• 6f68f894 - plugins: purge use of set_category()
• 79d852d5 - purge remaining set_category() artifacts

Compare with previous version

enabled an automatic merge when the pipeline for 79d852d5 succeeds

merged