[BoundsSafety] Accept new CompatibleVoidPtrToNonVoidPtr assign kind.

This was introduced in 15321d2.

While there, move CompatiblePointerDiscardsQualifiers with it
to the non-error part of the switch.

rdar://150382427

Author: ahmedbougacha

clang/lib/Sema/SemaExpr.cpp

@@ -12325,7 +12325,6 @@ bool Sema::isCompatibleBoundsUnsafeAssignment(
   case IncompatibleFunctionPointer:
   case IncompatibleFunctionPointerStrict:
   case IncompatiblePointerSign:
-  case CompatiblePointerDiscardsQualifiers:
   case IncompatiblePointerDiscardsQualifiers:
   case IncompatibleNestedPointerAddressSpaceMismatch:
   case IncompatibleNestedPointerQualifiers:
@@ -12334,6 +12333,8 @@ bool Sema::isCompatibleBoundsUnsafeAssignment(
   case Incompatible:
   // Not errors
   case CompatibleSingleToExplicitIndexablePointer:
+  case CompatiblePointerDiscardsQualifiers:
+  case CompatibleVoidPtrToNonVoidPtr:
   case Compatible:
     return false;
   }