### 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 'p':
								case 'q':
									if (color_symbols.size() > 0 || position_symbols.size() > 0) {
										mix_error = true;
										break;
									}
									if (!texture_symbols.has(c[i])) {
										texture_symbols.insert(c[i]);
									} else {
										repeated = true;
									}
									break;
								default:
									ok = false;
									break;
							}
						}
					} break;
					default: {
						ok = false;
					}
				}
				if (mix_error) {
					_set_error(vformat(RTR("Cannot combine symbols from different sets in expression '.%s'."), ident));
					return nullptr;
				}
				if (!ok) {
					_set_error(vformat(RTR("Invalid member for '%s' expression: '.%s'."), (dt == TYPE_STRUCT ? st : get_datatype_name(dt)), ident));
					return nullptr;
				}