Avoid unnecessary est result compute in must_split (#2431)
Avoid unnecessary est result compute in must_split (#2431)

This avoid computing the estimated result size when we will ignore it
when `skip_split_on_est_size_` is set to true.
TileDB-Inc/TileDB,TileDB-Inc/TileDB,TileDB-Inc/TileDB,TileDB-Inc/TileDB