This subtitle does not: limit any other law that: waives the sovereign immunity of the State or the units of the State government in tort; or authorizes the State or its units to have insurance for tortious conduct; waive any right or defense of the State or its units, officials, or employees in an action in a court of the United States or any other state, including any defense that is available under the 11th Amendment to the United States Constitution; or apply to or waive any immunity of a bicounty unit, county, municipal corporation, or other political subdivision or any unit, official, or employee of any of those agencies or subdivisions.