[mlir][python] Disable pytype not-yet-supported error on Buffer import (#189440)
For pyhon versions <3.12, pytype complains that:
```
error: in <module>: collections.abc.Buffer not supported yet [not-supported-yet]
from collections.abc import Buffer as _Buffer
```
Since it seems like this code intends to support <3.12, disabling the
type error on this line.