Disable test/Interop/Cxx/class/move-only/inherited-field-access-silgen.swift

This test does not produce consistent SIL across various test
configurations. We have a discrepancy on whether an argument is
@in_guaranteed vs. @guaranteed.

Tracked in rdar://128424443.

Author: atrick

test/Interop/Cxx/class/move-only/inherited-field-access-silgen.swift

@@ -1,6 +1,8 @@
 // RUN: %target-swift-emit-sil -I %S/Inputs -cxx-interoperability-mode=swift-6 %s -validate-tbd-against-ir=none | %FileCheck %s
 // RUN: %target-swift-emit-sil -I %S/Inputs -cxx-interoperability-mode=upcoming-swift %s -validate-tbd-against-ir=none | %FileCheck %s
 
+// REQUIRES: rdar128424443
+
 import MoveOnlyCxxValueType
 
 func testGetX() -> CInt {