Implement online_write_batch for remote #5205

When working with Feast Operator, I trying to push to an online store

online_store:
  ...
  type: remote
  ...
  vector_enabled: true
  vector_len: 64

And I getting NotImplementedError

at /opt/app-root/lib64/python3.11/site-packages/feast/infra/online_stores/remote.py:63

This is essential for using the Feast Operator online_store.
Thanks!