By Jarrett Renshaw and Joseph Ax PHILADELPHIA (Reuters) -Pennsylvania Lieutenant Governor John Fetterman won the state’s Democratic primary on Tuesday in a critical U.S. Senate race, Edison Research projected, despite having been hospitalized since Friday after suffering a stroke. Fetterman, a progressive Democrat whose victory over centrist U.S. congressman Conor Lamb came just hours after Fetterman’s campaign said he had a pacemaker implanted to address the irregular heart rhythms that caused the stroke, has said doctors expect a full recovery. The Republican senatorial primary in Pennsylvan…