fold _to_config_structure into base64_string

Author: lobsterkatie

src/sentry/grouping/enhancer/__init__.py

@@ -755,18 +755,16 @@ def assemble_stacktrace_component(
 
         return stacktrace_component
 
-    def _to_config_structure(self) -> list[Any]:
-        # TODO: Can we switch this to a tuple so we can type it more exactly?
-        return [
-            self.version,
-            self.bases,
-            [rule._to_config_structure(self.version) for rule in self.rules],
-        ]
-
     @cached_property
     def base64_string(self) -> str:
         """A base64 string representation of the enhancements object"""
-        pickled = msgpack.dumps(self._to_config_structure())
+        pickled = msgpack.dumps(
+            [
+                self.version,
+                self.bases,
+                [rule._to_config_structure(self.version) for rule in self.rules],
+            ]
+        )
         compressed_pickle = zstandard.compress(pickled)
         base64_bytes = base64.urlsafe_b64encode(compressed_pickle).strip(b"=")
         base64_str = base64_bytes.decode("ascii")