[Test] Disabled test failing in macOS PR testing.

rdar://106457182

Author: nate-chandler

test/Generics/requirement_machine_diagnostics.swift

@@ -1,5 +1,7 @@
 // RUN: %target-typecheck-verify-swift -warn-redundant-requirements
 
+// REQUIRES: rdar106457182
+
 func testInvalidConformance() {
   // expected-error@+1 {{type 'T' constrained to non-protocol, non-class type 'Int'}}
   func invalidIntConformance<T>(_: T) where T: Int {}