[server] Support altering table.auto-partition.enabled

### Search before asking

- [x] I searched in the [issues](https://github.com/apache/fluss/issues) and found nothing similar.

### Description

Support altering table.auto-partition.enabled

### Willingness to contribute

- [x] I'm willing to submit a PR!

Start by tracing the server-side handling for table alteration and how table.auto-partition.enabled is currently defined and read. Compare existing alterable table properties and their tests, then verify that changing this property works through the supported table-alteration path and is covered by tests.

Written by the indexing model from the issue text.