Setting TextureRect.texture does not update the node's size in the same frame.

### Tested versions

Godot 4.3.dev4.official

### System information

Pop!_OS 22.04 LTS - 64 Bits

### Issue description

Doing `TextureRect.texture = load("path.image")` does not update the node's size until the next frame. Which makes things like replacing the texture in the same call behave unexpectedly if you are assuming that doing `TextureRect.texture = null` resets the `size` to zero.

Workaround is to wait for the next frame for it to properly reset the `size`.

### Steps to reproduce

Reproducible in the MRP provided.

### Minimal reproduction project (MRP)

[project.zip](https://github.com/godotengine/godot/files/14528477/project.zip)

Start with the attached project.zip and reproduce the TextureRect.texture assignment behavior described in the issue. Investigate why assigning null or another texture leaves the node size unchanged until the next frame. Done means the node size reflects the new texture within the same frame, with the reproduction project confirming the behavior.

Written by the indexing model from the issue text.