feat(new-dataset): replace Autocomplete with AutoCompleteField for models and projects

[Innagl]

Describe your changes

Migrated the "Used in models" and "Used in use cases" fields in Modals/NewDataset/index.tsx from the raw MUI "Autocomplete" component to the shared "AutoCompleteField" wrapper.

Write your issue number after "Fixes "

Fixes #3764

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