fix: device state of input model for memory metrics

[johannaSommer]

Description

This PR fixes failures in the memory_metric tests as the input model is on CPU, which is not allowed for this metric.

Related Issue

None.

Type of Change

• 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

How Has This Been Tested?

Reran failing tests locally.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Additional Notes

None.

[begumcig]

Hihi I also added these in the multiGPU PR but already merging it makes so much sense for the nightlies and releases tysmmmm ❤️❤️. Looks super good to me!!