Make Transforms optional for Mesh3d, PointLight, Spotlight

[HackerFoo]

What problem does this solve or what need does it fill?

For Noumenal, I use a custom transform type, and use this type to set GlobalTransform. Forcing the Transform component causes a conflict with multiple systems writing to GlobalTransform in this case, and also wastes memory.

What solution would you like?

I would like Transform components to be optional (not required.)

What alternative(s) have you considered?

One workaround is to remove automatically added Transforms, but this is clunky, and I'm surprised that it even works.

Additional context

With #16246, Transforms could be suggested components, or maybe there could be a way to remove or substitute required components when a plugin is loaded.