public static String buildServiceInstancePath(final String rpcType) {
        return String.join(SEPARATOR, ROOT_PATH, "service", rpcType)
                .replace("/", DOT_SEPARATOR).substring(1);
    }
Build nacos instance service path string.
build child path of "shenyu.register.service.{rpcType}".

@param rpcType the rpc type
@return the string
shenyu-register-center/shenyu-register-common/src/main/java/org/apache/shenyu/register/common/path/RegisterPathConstants.java