Support database bootstrap in the admin tool

### Is your feature request related to a problem? Please describe.

Currently the [Admin Tool](https://github.com/apache/polaris/tree/main/runtime/admin) has a `bootstrap` command that initializes "realms".

However, currently the JDBC persistence allows multiple realms to be stored within the same JDBC schema.

Therefore, managing the database schema is a high-level concern than managing realms.

It would be nice to have a separate command in the Admin Tool dedicated specifically to running one-time Persistence setup tasks (e.g. creating JDBC schema).

### Describe the solution you'd like

_No response_

### Describe alternatives you've considered

_No response_

### Additional context

_No response_