Internals: Carry 'with' clause as op4 on AstNodeFTaskRef (#7114)

op4 is now available to carry the 'with' clause explicitly instead of
being part of the argument lit. Will strengthen 'pinsp' to be
List[AstArg] next.

src/V3Task.cpp

@@ -1777,7 +1777,6 @@ V3TaskConnects V3Task::taskConnects(AstNodeFTaskRef* nodep, AstNode* taskStmtsp,
     bool reorganize = false;
     for (AstNode *nextp, *pinp = nodep->pinsp(); pinp; pinp = nextp) {
         nextp = pinp->nextp();
-        if (VN_IS(pinp, With)) continue;
         AstArg* const argp = VN_AS(pinp, Arg);
         UASSERT_OBJ(argp, pinp, "Non-arg under ftask reference");
         if (argp->name() != "") {