Allow setting write_global_seqno option (#631)

See the issue [here](https://github.com/tikv/tikv/issues/10430

) 

This PR provides the Rust API of setting `IngestExternalFileOptions::write_global_seqno`

Signed-off-by: Yang Zhang <yang.zhang@pingcap.com>

Signed-off-by: v01dstar <yang.zhang@pingcap.com>