### Godot version

4.0 beta 10

### System information

Windows 10, Vulkan Renderer

### Issue description

In 2D scenes with sprites, when the sprite's `flip_h` and/or `flip_v` property is enabled, the normal map is flipped with the image, causing lighting to be reversed. While this does technically make sense, in a game where You have a bunch of sprites that flip and use normal maps, the only solution is to generate normal maps for both facing directions.
![image](https://user-images.githubusercontent.com/47702559/209426338-6257d66c-a965-4793-a7bb-5a635a136267.png)

Ultimately the fix is simple: Invert the red channel in normal maps on horizontally flipped sprites, and invert the green channel on vertically flipped sprites.

### Steps to reproduce

1) Create a Sprite2D
2) Add a Diffuse Texture and Normal Map 
3) Add a 2D Light to the scene
4) Enable `flip_h` and/or `flip_v` on the Sprite2D

### Minimal reproduction project

[Normal not flipped.zip](https://github.com/godotengine/godot/files/10298203/Normal.not.flipped.zip)

p_mat4[0] = p_transform.columns[0][0];
	p_mat4[1] = p_transform.columns[0][1];
	p_mat4[2] = 0;
	p_mat4[3] = 0;
	p_mat4[4] = p_transform.columns[1][0];
	p_mat4[5] = p_transform.columns[1][1];
	p_mat4[6] = 0;
	p_mat4[7] = 0;
	p_mat4[8] = 0;
	p_mat4[9] = 0;
	p_mat4[10] = 1;
	p_mat4[11] = 0;
	p_mat4[12] = p_transform.columns[2][0];
	p_mat4[13] = p_transform.columns[2][1];
	p_mat4[14] = 0;
	p_mat4[15] = 1;
}
void RasterizerCanvasGLES3::_update_transform_2d_to_mat2x4(const Transform2D &p_transform, float *p_mat2x4) {
	p_mat2x4[0] = p_transform.columns[0][0];
	p_mat2x4[1] = p_transform.columns[1][0];
	p_mat2x4[2] = 0;
	p_mat2x4[3] = p_transform.columns[2][0];
	p_mat2x4[4] = p_transform.columns[0][1];
	p_mat2x4[5] = p_transform.columns[1][1];
	p_mat2x4[6] = 0;
	p_mat2x4[7] = p_transform.columns[2][1];
}
void RasterizerCanvasGLES3::_update_transform_2d_to_mat2x3(const Transform2D &p_transform, float *p_mat2x3) {