eth/tracers: fix flatCallTracer crasher (#27304)

FlatCallTracer had a crasher when it was passed `onlyTopCall: true` as config.
This PR ignores config fields inherited from the normal call tracer.

eth/tracers/native/call_flat.go

@@ -129,7 +129,9 @@ func newFlatCallTracer(ctx *tracers.Context, cfg json.RawMessage) (tracers.Trace
 		}
 	}
 
-	tracer, err := tracers.DefaultDirectory.New("callTracer", ctx, cfg)
+	// Create inner call tracer with default configuration, don't forward
+	// the OnlyTopCall or WithLog to inner for now
+	tracer, err := tracers.DefaultDirectory.New("callTracer", ctx, nil)
 	if err != nil {
 		return nil, err
 	}