[Test] Disable partial_apply_forwarder.sil for arm64e.

rdar://problem/71408349

Author: nate-chandler

test/IRGen/async/partial_apply_forwarder.sil

@@ -2,6 +2,7 @@
 // RUN: %target-swift-frontend -enable-experimental-concurrency -disable-objc-interop -primary-file %s -emit-ir | %FileCheck %s -DINT=i%target-ptrsize --check-prefixes=CHECK,CHECK-native
 
 // REQUIRES: concurrency
+// UNSUPPORTED: CPU=arm64e
 
 sil_stage canonical