[MINOR] [SQL] Update usage of `debug` by removing `typeCheck` and adding `debugCodegen`

## What changes were proposed in this pull request?

This PR updates the usage comments of `debug` according to the following commits.
- [SPARK-9754](https://issues.apache.org/jira/browse/SPARK-9754) removed `typeCheck`.
- [SPARK-14227](https://issues.apache.org/jira/browse/SPARK-14227) added `debugCodegen`.

## How was this patch tested?

Manual.

Author: Dongjoon Hyun <dongjoon@apache.org>

Closes #12094 from dongjoon-hyun/minor_fix_debug_usage.