Reduce redundancy between namedarray and variable tests (#8405)

Co-authored-by: Deepak Cherian <dcherian@users.noreply.github.com>
Co-authored-by: Maximilian Roos <5635139+max-sixty@users.noreply.github.com>
Co-authored-by: Anderson Banihirwe <13301940+andersy005@users.noreply.github.com>

Author: 4 people