### 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 (tk.type == TK_OP_ASSIGN) {
							if (!is_constant) {
								_set_error(vformat(RTR("Global non-constant variables are not supported. Expected '%s' keyword before constant definition."), "const"));
								return ERR_PARSE_ERROR;
							}
							if (constant.array_size > 0 || unknown_size) {
								bool full_def = false;
								VariableDeclarationNode::Declaration decl;
								decl.name = name;
								decl.size = constant.array_size;
								tk = _get_token();
								if (tk.type != TK_CURLY_BRACKET_OPEN) {
									if (unknown_size) {
										_set_expected_error("{");
										return ERR_PARSE_ERROR;
									}
									full_def = true;
									DataPrecision precision2 = PRECISION_DEFAULT;
									if (is_token_precision(tk.type)) {
										precision2 = get_token_precision(tk.type);
										tk = _get_token();
										if (!is_token_nonvoid_datatype(tk.type)) {
											_set_error(RTR("Expected data type after precision modifier."));
											return ERR_PARSE_ERROR;
										}
									}
									StringName struct_name2;
									DataType type2;