[flang][cuda] Add restriction on assumed size device variable (llvm#87664)

According to
https://docs.nvidia.com/hpc-sdk/compilers/cuda-fortran-prog-guide/#cfpg-var-qual-attr-device

> A device array may be an explicit-shape array, an allocatable array,
or an assumed-shape dummy array.

Assumed size array are not supported. This patch adds an error for that
case.

Author: clementval

flang/lib/Semantics/check-declarations.cpp

@@ -948,6 +948,11 @@ void CheckHelper::CheckObjectEntity(
             "Component '%s' with ATTRIBUTES(DEVICE) must also be allocatable"_err_en_US,
             symbol.name());
       }
+      if (IsAssumedSizeArray(symbol)) {
+        messages_.Say(
+            "Object '%s' with ATTRIBUTES(DEVICE) may not be assumed size"_err_en_US,
+            symbol.name());
+      }
       break;
     case common::CUDADataAttr::Managed:
       if (!IsAutomatic(symbol) && !IsAllocatable(symbol) &&

flang/test/Semantics/cuf03.cuf

@@ -51,7 +51,8 @@ module m
  contains
   attributes(device) subroutine devsubr(n,da)
     integer, intent(in) :: n
-    real, device :: da(*) ! ok
+    !ERROR: Object 'da' with ATTRIBUTES(DEVICE) may not be assumed size
+    real, device :: da(*)
     real, managed :: ma(n) ! ok
     !WARNING: Pointer 'dp' may not be associated in a device subprogram
     real, device, pointer :: dp