[VL] Enhance Velox Cache to Support Relative Paths and Multiple Disk Storage

### Description

Currently, Velox Cache only supports absolute file paths. It would be beneficial to extend support to relative paths as well, allowing users to specify paths relative to the spark.local.dirs directory. Additionally, enabling Velox Cache to utilize multiple disk storage would enhance its versatility and suitability for various use cases.

The current PR depends on [#9284](https://github.com/facebookincubator/velox/pull/9284) in velox, which needs to be merged before it can be supported.