### 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_IDENTIFIER) {
					_set_error(RTR("Expected an identifier."));
					return ERR_PARSE_ERROR;
				}
				prev_pos = _get_tkpos();
				name = tk.text;
				if (_find_identifier(nullptr, false, constants, name)) {
					_set_redefinition_error(String(name));
					return ERR_PARSE_ERROR;
				}
				if (has_builtin(p_functions, name)) {
					_set_redefinition_error(String(name));
					return ERR_PARSE_ERROR;
				}
				if (is_uniform) {
					if (uniform_scope == ShaderNode::Uniform::SCOPE_GLOBAL && Engine::get_singleton()->is_editor_hint()) { 
						
						DataType gvtype = global_shader_uniform_get_type_func(name);
						if (gvtype == TYPE_MAX) {
							_set_error(vformat(RTR("Global uniform '%s' does not exist. Create it in Project Settings."), String(name)));
							return ERR_PARSE_ERROR;
						}
						if (type != gvtype) {
							_set_error(vformat(RTR("Global uniform '%s' must be of type '%s'."), String(name), get_datatype_name(gvtype)));
							return ERR_PARSE_ERROR;
						}
					}
					ShaderNode::Uniform uniform;