Tracking issue: table transforms

[larsyencken]

• https://github.com/owid/owid-grapher/issues/2136
• https://github.com/owid/owid-grapher/issues/1341
• https://github.com/owid/owid-grapher/issues/2127
• https://github.com/owid/owid-grapher/issues/2866

[github-actions[bot]]

This issue has had no activity within 10 months. It is considered stale and will be closed in 7 days unless it is worked on or tagged as pinned.