Try to fix failure of this test on noasserts builds of the compiler

This test failed on the oss-swift_tools-R_stdlib-RD_test-simulator bot.

rdar://54707188

Author: aschwaighofer

validation-test/compiler_crashers_2/sr11232.swift

@@ -1,5 +1,7 @@
 // RUN: not --crash %target-swift-emit-silgen %s
 
+// REQUIRES: asserts
+
 protocol Pub {
   associatedtype Other
   associatedtype Failure: Error