### 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
for (int k = 0; k < args.size(); k++) {
				if (get_scalar_type(args[k]) != args[k] || args[k] == pfunc->arguments[k].type || p_func->arguments[k + 1]->type != Node::TYPE_CONSTANT) {
					
					continue;
				}
				
				ConstantNode *constant = static_cast<ConstantNode *>(p_func->arguments[k + 1]);
				ConstantNode *conversion = alloc_node<ConstantNode>();
				conversion->datatype = pfunc->arguments[k].type;
				conversion->values.resize(1);
				convert_constant(constant, pfunc->arguments[k].type, conversion->values.ptrw());
				p_func->arguments.write[k + 1] = conversion;
			}
			if (r_ret_type) {
				*r_ret_type = pfunc->return_type;
				if (pfunc->return_type == TYPE_STRUCT) {
					*r_ret_type_str = pfunc->return_struct_name;
				}
			}
			return true;
		}
	}
	if (last_arg_count > args.size()) {
		_set_error(vformat(RTR("Too few arguments for \"%s(%s)\" call. Expected at least %d but received %d."), String(name), arg_list, last_arg_count, args.size()));
	} else if (last_arg_count < args.size()) {
		_set_error(vformat(RTR("Too many arguments for \"%s(%s)\" call. Expected at most %d but received %d."), String(name), arg_list, last_arg_count, args.size()));
	}
	return false;
}
bool ShaderLanguage::_compare_datatypes(DataType p_datatype_a, String p_datatype_name_a, int p_array_size_a, DataType p_datatype_b, String p_datatype_name_b, int p_array_size_b) {