Description of changes:

Restores and completes the audit for the roundf32 (roundf) and roundf64 (round) intrinsics.

Resolved issues:

Part of #1163
Part of #1025

Call-outs:

Testing:

• How is this change tested? Adds 2 tests, removes 2 tests.

• Is this a refactor change? No.

Checklist

• Each commit message has a non-empty body, explaining why the change was made
• Methods or procedures are documented
• Regression or unit tests are included, or existing tests cover the modified code
• My PR is restricted to a single feature or bugfix

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.