### 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
if (shader->structs.has(tk.text)) {
										type2 = TYPE_STRUCT;
										struct_name2 = tk.text;
									} else {
										if (!is_token_variable_datatype(tk.type)) {
											_set_error(RTR("Invalid data type for the array."));
											return ERR_PARSE_ERROR;
										}
										type2 = get_token_datatype(tk.type);
									}
									int array_size2 = 0;
									tk = _get_token();
									if (tk.type == TK_BRACKET_OPEN) {
										bool is_unknown_size = false;
										Error error = _parse_array_size(nullptr, constants, false, nullptr, &array_size2, &is_unknown_size);
										if (error != OK) {
											return error;
										}
										if (is_unknown_size) {
											array_size2 = constant.array_size;
										}
										tk = _get_token();
									} else {
										_set_expected_error("[");
										return ERR_PARSE_ERROR;
									}
									if (constant.precision != precision2 || constant.type != type2 || struct_name != struct_name2 || constant.array_size != array_size2) {
										String from;
										if (type2 == TYPE_STRUCT) {
											from += struct_name2;