### 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
_set_error(RTR("Opaque types cannot be output parameters."));
							return ERR_PARSE_ERROR;
						}
					}
					if (is_struct) {
						param_type = TYPE_STRUCT;
					} else {
						param_type = get_token_datatype(tk.type);
						if (param_type == TYPE_VOID) {
							_set_error(RTR("Void type not allowed as argument."));
							return ERR_PARSE_ERROR;
						}
					}
					if (param_precision != PRECISION_DEFAULT && _validate_precision(param_type, param_precision) != OK) {
						return ERR_PARSE_ERROR;
					}
#ifdef DEBUG_ENABLED
					keyword_completion_context = CF_UNSPECIFIED;
#endif 
					tk = _get_token();
					if (tk.type == TK_BRACKET_OPEN) {
						Error error = _parse_array_size(nullptr, constants, true, nullptr, &arg_array_size, nullptr);
						if (error != OK) {
							return error;
						}
						tk = _get_token();
					}
					if (tk.type != TK_IDENTIFIER) {
						_set_error(RTR("Expected an identifier for argument name."));
						return ERR_PARSE_ERROR;