Don't allow transforming scene tiles

[KoBeWi]

Fixes #81918

[akien-mga]

Thanks!

[ettiSurreal]

Just to make sure, is this temporary, or is the ability to transform scene tiles not planned whatsoever?

[KoBeWi]

It was discussed here https://chat.godotengine.org/channel/editor?msg=zKCnZFgvEBovXWoJd (you need to wait a bit for the message to load)
For now there are no plans, as it's not that straightforward. Only rotation then be added somewhat reliably, flipping could be achieved with scale, but it shouldn't be used for physics objects. Another thing is that reserving bit for rotation will limit the number of scenes you can put in a collection (they rely only on alternative IDs).

[groud]

Just to make sure, is this temporary, or is the ability to transform scene tiles not planned whatsoever?

It could be done, but a bit technical to implement (and has some annoying drawbacks, like the impossibility to animate the scene position). So for now the simple solution is to disable it, even if it could maybe be implemented later if there's enough demand for it.