Serious visual regression with NinePatchRect

[Chaosus]

Tested versions

4.4 beta 1

System information

Windows 11

Issue description

I've detected that NinePatchRect which is valid previously (dev 7):

become blurred in the beta 1:

Steps to reproduce

Run game_dialog.tscn scene in the attached project, the bug is visible either in the game or in the editor.

Minimal reproduction project (MRP)

NprBug.zip

[bruvzg]

Seems to be OpenGL specific issue, it's not reproducible with Metal and Vulkan.

[AThousandShips]

Bisecting Resolved

[bruvzg]

Seems to be regression from #99230, this line in particular, removing it fix the issue:

https://github.com/paddy-exe/godot/blob/4ce466d7fa79e351d4295d5bb47e3266089c3a59/drivers/gles3/rasterizer_canvas_gles3.cpp#L918

cc @paddy-exe