[Compile Time Constant Extraction] Guard Runtime Metadata Attributes test behind requires=asserts

Author: artemcm

test/ConstExtraction/ExtractRuntimeMetadataAttr.swift

@@ -4,6 +4,8 @@
 // RUN: %target-swift-frontend -typecheck -emit-const-values-path %t/ExtractRuntimeMetadataAttr.swiftconstvalues -const-gather-protocols-file %t/protocols.json -primary-file %s -enable-experimental-feature RuntimeDiscoverableAttrs
 // RUN: cat %t/ExtractRuntimeMetadataAttr.swiftconstvalues 2>&1 | %FileCheck %s
 
+// REQUIRES: asserts
+
 @runtimeMetadata
 struct Flag<T> {
   init(attachedTo: T.Type, _ description: String = "") {}