feat: Fixed the issue where the test database connection was successful but the prompt message showed that there was no error status #1739 (#2051)

### What problem does this PR solve?

feat: Fixed the issue where the test database connection was successful
but the prompt message showed that there was no error status #1739

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/hooks/flow-hooks.ts

     mutationKey: ['testDbConnect'],
     mutationFn: async (params: any) => {
       const ret = await flowService.testDbConnect(params);
-      if (ret?.retcode === 0) {
+      if (ret?.data?.retcode === 0) {
         message.success(ret?.data?.data);
       } else {
         message.error(ret?.data?.data);