Separate api sec standalone scenario from asm standalone

Author: IlyasShabi

tests/appsec/test_asm_standalone.py

@@ -862,12 +862,17 @@ def propagated_tag_value(self):
 
 
 @rfc("https://docs.google.com/document/d/18JZdOS5fmnYomRn6OGer0ViS1I6zzT6xl5HMtjDtFn4/edit")
-@features.appsec_standalone
 @features.api_security_configuration
 @scenarios.appsec_standalone_api_security
-class Test_APISecurityStandalone(Test_AppSecStandalone_UpstreamPropagation_V2):
+class Test_APISecurityStandalone(BaseAppSecStandaloneUpstreamPropagation):
     """Test API Security schemas are retained in ASM Standalone mode regardless of sampling"""
 
+    def propagated_tag(self):
+        return "_dd.p.ts"
+
+    def propagated_tag_value(self):
+        return "02"
+
     @staticmethod
     def get_schema(request, address) -> list | None:
         """Extract API security schema from span metadata"""