Support fine-grained configuration for the inner cache of RocksDB

### Task Description

**What needs to be done:**

**Why this task is needed:**

### Task Type

Performance optimization

### Related Issues

**Parent feature issue:** (if applicable )
**Related issues:**
NOTE: Use `Relationships` button to add parent/blocking issues after issue is created.

No source files, tests, entry points, or concrete configuration requirements are identified. Start by locating Hudi's existing RocksDB inner-cache configuration and review the related issue context; completion criteria for the requested fine-grained configuration still need to be defined.

Written by the indexing model from the issue text.