### 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
tk = _get_token();
							if (!fixed_array_size) {
								array_size = 0;
							}
							unknown_size = false;
						} else if (tk.type == TK_SEMICOLON) {
							break;
						} else {
							_set_expected_error(",", ";");
							return ERR_PARSE_ERROR;
						}
					}
					break;
				}
				FunctionInfo builtins;
				if (p_functions.has(name)) {
					builtins = p_functions[name];
				}
				if (p_functions.has("global")) { 
					for (const KeyValue<StringName, BuiltInInfo> &E : p_functions["global"].built_ins) {
						builtins.built_ins.insert(E.key, E.value);
					}
				}
				if (p_functions.has("constants")) { 
					for (const KeyValue<StringName, BuiltInInfo> &E : p_functions["constants"].built_ins) {
						builtins.built_ins.insert(E.key, E.value);
					}
				}
				for (int i = 0; i < shader->functions.size(); i++) {
					if (!shader->functions[i].callable && shader->functions[i].name == name) {