[FEATURE] Support StarRocks Authorization Pushdown

### Describe the feature

Extend Apache Gravitino to support StarRocks as a unified permission management gateway.

### Motivation

Leverage the unified authorization APIs provided by Apache Gravitino to manage authorization for StarRocks.

### Describe the solution
See details:
https://docs.google.com/document/d/1Y2ZvmUa-vLcKShb0oh2R7zNPJ9h30AXesQ8JN2XkJ1U/edit?tab=t.0#heading=h.6io290yaxm3z

### Additional context

_No response_

Start by reading the linked Google design document for the proposed StarRocks authorization pushdown and unified permission-management behavior. The issue does not identify implementation files, tests, or entry points; completion should be defined by the design document and agreed project scope.

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