Features: update the fx model for output dtype match

[wu6u3tw]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project (You can use the linters)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas and hacks
• I have made corresponding changes to the documentation
• I have added tests to verify my fix or my feature
• New and existing unit tests pass locally with my changes
• I have added the relevant labels to my PR in so that relevant reviewers are notified

[gs-olive]

The changes look good to me pending CI + Linting passing, I think this will reduce errors in FX related to mismatched types particularly for FP16 engines. A rebase onto main is necessary for the CI to pass here, and linting via pre-commit may be needed for the linter check.

Note: See #2004 for the analogous Dynamo updates

[wu6u3tw]

@nvpohanh for viz

[narendasan]

Closing as dynamo will handle this