[3.x] Revert "FTI - Reduce VisualInstance xform notifications"

[lawnjelly]

This reverts commit 5ec4fd3.

Fixes #107829
Fixes #107755

3.x version of #107854

IMPORTANT: I think we should merge this before building 3.7 alpha 1, to avoid regressions seen in 4.5 beta 1.

Notes

• As with 4.x, I think it would be wise to do this a slightly different way, SoftBody in particular relies on this with its current hacky approach.
• I'll revisit this to see if we can reduce these without causing regressions, it's not critical for 3.7 alpha 1.
• As noted on the original PR, this area was experimental and prone to regressions (the reason for separating it into a self-contained PR in the first place).

[lawnjelly]

Thanks!