### 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
}
					shader->varyings[name] = varying;
#ifdef DEBUG_ENABLED
					if (check_warnings && HAS_WARNING(ShaderWarning::UNUSED_VARYING_FLAG)) {
						used_varyings.insert(name, Usage(tk_line));
					}
#endif 
				}
			} break;
			case TK_UNIFORM_GROUP: {
				tk = _get_token();
				if (tk.type == TK_IDENTIFIER) {
					current_uniform_group_name = tk.text;
					tk = _get_token();
					if (tk.type == TK_PERIOD) {
						tk = _get_token();
						if (tk.type == TK_IDENTIFIER) {
							current_uniform_subgroup_name = tk.text;
							tk = _get_token();
							if (tk.type != TK_SEMICOLON) {
								_set_expected_error(";");
								return ERR_PARSE_ERROR;
							}
						} else {
							_set_error(RTR("Expected an uniform subgroup identifier."));
							return ERR_PARSE_ERROR;
						}
					} else if (tk.type != TK_SEMICOLON) {
						_set_expected_error(";", ".");
						return ERR_PARSE_ERROR;