[flang] RESHAPE(PAD=) can be arbitrary array rank

The "pad=" argument in the intrinsic function table entry for RESHAPE
has a Rank::Array constraint, and that would be fine if not for RESHAPE
already having an earlier argument that's Rank::Array.  It's the only
intrinsic that has multiple Rank::Array arguments.  The checking for
the Rank::Array constraint was enforcing that multiple occurrences
of it have the same rank in a call, and that's not appropriate.

Differential Revision: https://reviews.llvm.org/D117149

flang/lib/Evaluate/intrinsics.cpp

@@ -1496,8 +1496,6 @@ std::optional<SpecificCall> IntrinsicInterface::Match(
         if (!arrayArg) {
           arrayArg = arg;
           arrayArgName = d.keyword;
-        } else {
-          argOk &= rank == arrayArg->Rank();
         }
         break;
       case Rank::coarray: