Function encode_delete_points_proto 

pub fn encode_delete_points_proto(
    buf: &mut BytesMut,
    collection_name: &str,
    point_ids: &[u64],
)

Encode a DeletePoints request.

DeletePoints message:

• Field 1: collection_name (string)
• Field 2: wait (bool)
• Field 4: points (PointsSelector message)

PointsSelector (oneof):

• Field 1: points (PointsIdsList message)

PointsIdsList:

• Field 1: ids (repeated PointId)