The Legislature of the State of West Virginia, in codifying certain elements and doctrines of the common law regarding legislative immunity through the enactment of this article, does not intend to narrow the common law definition of legislative immunity that is afforded the Legislature under the speech or debate privilege and the separation or division of powers, and does not, with the enactment of this article, otherwise revoke or abrogate any portion of the common law. This article shall not be construed so as to narrow, restrict, revoke or abrogate the common law.