### Godot version

4.0.beta14

### System information

windows 10, gles 3, nvidia graphics

### Issue description

SCREEN_TEXTURE  was dropped in beta 14. The suggested replacement is to use ```uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmaps;```, but filter_linear_mipmaps is not recognized as a valid shader type hint and a shader using it fails to compile.

### Steps to reproduce

Create a canvas item shader and use the filter_linear_mipmaps type hint with a sampler2D uniform.

### Minimal reproduction project

N/A
case TYPE_INT:
			return "int";
		case TYPE_IVEC2:
			return "ivec2";
		case TYPE_IVEC3:
			return "ivec3";
		case TYPE_IVEC4:
			return "ivec4";
		case TYPE_UINT:
			return "uint";
		case TYPE_UVEC2:
			return "uvec2";
		case TYPE_UVEC3:
			return "uvec3";
		case TYPE_UVEC4:
			return "uvec4";
		case TYPE_FLOAT:
			return "float";
		case TYPE_VEC2:
			return "vec2";
		case TYPE_VEC3:
			return "vec3";
		case TYPE_VEC4:
			return "vec4";
		case TYPE_MAT2:
			return "mat2";
		case TYPE_MAT3:
			return "mat3";
		case TYPE_MAT4:
			return "mat4";