### 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
return (
			p_type == TK_ARG_IN ||
			p_type == TK_ARG_OUT ||
			p_type == TK_ARG_INOUT);
}
ShaderLanguage::DataPrecision ShaderLanguage::get_token_precision(TokenType p_type) {
	if (p_type == TK_PRECISION_LOW) {
		return PRECISION_LOWP;
	} else if (p_type == TK_PRECISION_HIGH) {
		return PRECISION_HIGHP;
	} else {
		return PRECISION_MEDIUMP;
	}
}
String ShaderLanguage::get_precision_name(DataPrecision p_type) {
	switch (p_type) {
		case PRECISION_LOWP:
			return "lowp";
		case PRECISION_MEDIUMP:
			return "mediump";
		case PRECISION_HIGHP:
			return "highp";
		default:
			break;
	}
	return "";
}
String ShaderLanguage::get_interpolation_name(DataInterpolation p_interpolation) {