fix: Preserve data after reading response body stream in S3/200 middl…

…eware (#1303)

Sources/Core/AWSClientRuntime/Middlewares/AWSS3ErrorWith200StatusXMLMiddleware.swift

@@ -33,10 +33,12 @@ public struct AWSS3ErrorWith200StatusXMLMiddleware<OperationStackOutput>: Middle
             return response
         }
 
+        response.httpResponse.body = .data(data)
+
         let xmlString = String(data: data, encoding: .utf8) ?? ""
         if xmlString.contains("<Error>") {
             // Handle the error as a 500 Internal Server Error
-            var modifiedResponse = response
+            let modifiedResponse = response
             modifiedResponse.httpResponse.statusCode = .internalServerError
             return modifiedResponse
         }