[Feature] exclude option for check_cols snapshot

[graciegoheen]

Is this your first time submitting a feature request?

• [X] I have read the expectations for open source contributors
• [X] I have searched the existing issues, and I could not find an existing issue for this feature
• [X] I am requesting a straightforward extension of existing dbt functionality, rather than a Big Idea better suited to a discussion

Describe the feature

Right now snapshots have check_cols - we could add a new config for the inverse, something like check_exclude_cols.

This would be similar to the incremental model config - merge_exclude_columns

Describe alternatives you've considered

No response

Who will this benefit?

No response

Are you interested in contributing this feature?

No response

Anything else?

No response