new feature: expose batch object deletion API to C++ binding

[dentiny]

Feature Description

Hi team, on rust core side batch deletion has already been supported here, while it's not exposed in C++ binding, so users have to implement their own parallel or batch deletion.

Problem and Solution

Expose the API from rust core to C++ API.

Additional Context

No response

Are you willing to contribute to the development of this feature?

• Yes, I am willing to contribute to the development of this feature.