Review licenses for spark 4 client

### Describe the bug From https://github.com/apache/polaris/pull/4612, spark 4.0 client support is added. We should review the license again before next release. Ref: https://github.com/apache/polaris/pull/4612#pullrequestreview-4437382622 ### To Reproduce _No response_ ### Actual Behavior _No response_ ### Expected Behavior _No response_ ### Additional context _No response_ ### System information _No response_