### 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
bool reading_type = false;
	String cur_identifier;
	for (int i = _get_first_ident_pos(p_code); i < p_code.length(); i++) {
		if (p_code[i] == ';') {
			break;
		} else if (p_code[i] <= 32) {
			if (!cur_identifier.is_empty()) {
				if (!reading_type) {
					if (cur_identifier != "shader_type") {
						return String();
					}
					reading_type = true;
					cur_identifier = String();
				} else {
					return cur_identifier;
				}
			}
		} else {
			cur_identifier += String::chr(p_code[i]);
		}
	}
	if (reading_type) {
		return cur_identifier;
	}
	return String();
}
bool ShaderLanguage::is_builtin_func_out_parameter(const String &p_name, int p_param) {