[DUCKDB] Read a special version of dataset

[eddyxu]

Closes #349

[changhiskhan]

does the replacement scan still work?

[eddyxu]

Yes, it still works for the case w/o version

❯ ./duckdb -unsigned
v0.6.0 2213f9c946
Enter ".help" for usage hints.
D FORCE INSTALL './lance.duckdb_extension';
D LOAD 'lance';
D select _pk FROM 's3://eto-public/datasets/oxford_pet/oxford_pet.lance' LIMIT 10;
┌───────┐
│  _pk  │
│ int16 │
├───────┤
│     0 │
│     1 │
│     2 │
│     3 │
│     4 │
│     5 │
│     6 │
│     7 │
│     8 │
│     9 │
└───────┘