[Improvement] add error retry to Gravitino client

### What would you like to be improved?

It's better to add error retry mechanism to improve system robustness

### How should we improve?

_No response_

The issue does not name files, tests, entry points, or specific retryable errors. Start by locating the Gravitino client and reviewing how client failures are handled; define the retry scope, policy, and completion tests before implementation.

Written by the indexing model from the issue text.