[REVIEW] Handle bool types in round API

[galipremsagar]

Description

Fixes: #12648

This PR fixes an error in the round API when a bool column is present. The changes include cleaning up the pytest.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (branch-23.04@6a67e8f). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

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[brandon-b-miller]

LGTM. I guess I never realized that a rounded bool column is always just itself :)

[wence-]

I think this makes sense.

[galipremsagar]

/merge