[typelowering] Rename isMoveOnly() -> isMoveOnlyWrapped()

Just updating type lowering API to match the names on SILType.

Author: gottesmm

include/swift/SIL/TypeLowering.h

@@ -296,7 +296,7 @@ class TypeLowering {
     IsInfiniteType_t isInfinite() const {
       return IsInfiniteType_t((Flags & InfiniteFlag) != 0);
     }
-    IsMoveOnly_t isMoveOnly() const {
+    IsMoveOnly_t isMoveOnlyWrapped() const {
       return IsMoveOnly_t((Flags & MoveOnlyFlag) != 0);
     }