ACTOR Alec Baldwin pleaded not guilty to charges of involuntary manslaughter in the 2021 on-set shooting death of cinematographer Halyna Hutchins during filming of the Western movie "Rust" in New Mexico. Court documents showed Baldwin, 65, entered his plea as he waived his right to an arraignment nearly two weeks after a grand jury indicted the actor on Jan. 19, reviving a criminal case that had been dismissed months earlier. The Emmy-winning performer, who starred in the hit NBC television comedy "30 Rock," was allowed to remain free without posting bond under the arraignment waiver filed with the First Judicial…