### 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
switch (p_type) {
		case TYPE_STRUCT: {
			_set_error(RTR("The precision modifier cannot be used on structs."));
			return FAILED;
		} break;
		case TYPE_BOOL:
		case TYPE_BVEC2:
		case TYPE_BVEC3:
		case TYPE_BVEC4: {
			_set_error(RTR("The precision modifier cannot be used on boolean types."));
			return FAILED;
		} break;
		default:
			break;
	}
	return OK;
}
Error ShaderLanguage::_parse_shader(const HashMap<StringName, FunctionInfo> &p_functions, const Vector<ModeInfo> &p_render_modes, const HashSet<String> &p_shader_types) {
	Token tk;
	TkPos prev_pos;
	Token next;
	if (!is_shader_inc) {
#ifdef DEBUG_ENABLED
		keyword_completion_context = CF_SHADER_TYPE;
#endif 
		tk = _get_token();