Fix argparser in `matmul_bnb4_quantizer` (#19812)
### Description
<!-- Describe your changes. -->
The argparser had incorrectly used `description` and `options` instead
of `help` and `choices`.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
Fixes:
#19751
