[Test] Run in right contexts.

The validation-test/SILOptimizer/lexical-lifetimes.swift test uses
concurrency features.  Specified where that means the test can run
appropriately.

Author: nate-chandler

validation-test/SILOptimizer/lexical-lifetimes.swift

@@ -1,7 +1,9 @@
 // RUN: %target-run-simple-swift(-Xfrontend -disable-availability-checking -parse-as-library -Xfrontend -enable-copy-propagation) | %FileCheck %s
 
-// REQUIRES: concurrency
 // REQUIRES: executable_test
+// REQUIRES: concurrency
+// REQUIRES: concurrency_runtime
+// UNSUPPORTED: back_deployment_runtime
 
 // =============================================================================
 // = Declarations                                                           {{ =