test: Add crash when SentryInitializeForGettingSubclassesNotCalled is called

Author: noahsmartin

Tests/SentryTests/Integrations/Performance/SentryInitializeForGettingSubclassesNotCalled.m

@@ -5,6 +5,7 @@ @implementation SentryInitializeForGettingSubclassesNotCalled
 
 + (void)initialize
 {
+    assert(false);
     if (self == [SentryInitializeForGettingSubclassesNotCalled self]) {
         _SentryInitializeForGettingSubclassesCalled = YES;
     }