fix: add FT=Float32 to gpu tests

[haakon-e]

Purpose

add FT=Float32 to tests introduced in #113 so that they can be run on Metal devices (needed for #108)

To-do

Content

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• I have read and checked the items on the review checklist.

[haakon-e]

This change is part of the following stack:

• fix: add FT=Float32 to gpu tests #114 ◀
  • Support Metal as device #108

_{Change managed by git-spice.}