Create a round_to setting for float validator

[yfalomir]

Change Summary

Add a round_to setting to the float validator.
This PR is preliminary

Related issue number

"fix #8903

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

[codspeed-hq]

CodSpeed Performance Report

Merging #9283 will not alter performance

_{Comparing yfalomir:add-a-round-float-validator (92fa385) with main (6322b24)}

Summary

✅ 13 untouched benchmarks

[yfalomir]

@sydney-runkle is it the kind of changes you expected for #9283? If so I'll add tests and make the PR ready for review.

[sydney-runkle]

Closing based on #8903 (comment)