Moving platforms and CharacterBody2Ds are a bit buggy

### Tested versions

4.3

### System information

Godot v4.3.stable - Windows 10.0.19044 - GLES3 (Compatibility) - NVIDIA GeForce RTX 3060 (NVIDIA; 31.0.15.3770) - Intel(R) Core(TM) i5-10400F CPU @ 2.90GHz (12 Threads)

### Issue description

When putting a CharacterBody2D onto a moving platform, it doesn't stay perfectly on it, instead lagging behind.

### Steps to reproduce

-Make the default player controller, complete with nodes to have a working 2D character
-Make any type of moving platform (it has to be moving rather quickly)
-Stand on it

https://github.com/user-attachments/assets/552ff634-9dcb-4205-856a-21082a645016

### Minimal reproduction project (MRP)

[newGameProject.zip](https://github.com/user-attachments/files/17213449/newGameProject.zip)

Start by running the attached newGameProject.zip and reproducing the lag with the default CharacterBody2D controller and a rapidly moving platform. Compare the character’s position while standing on the platform and investigate the CharacterBody2D moving-platform behavior. Done means the character stays aligned with the platform in the reported setup without introducing regressions.

Written by the indexing model from the issue text.