CI: Dangling test_imageviewer_beam_to_world

This job was failing for a very small numpy array instability.

https://gitlab.esrf.fr/ui/daiquiri/-/jobs/243047

E       Not equal to tolerance rtol=1e-07, atol=0
E       
E       Mismatched elements: 1 / 40000 (0.0025%)
E       Max absolute difference: 3.0035153e-07
E       Max relative difference: 1.13397145e-07

The constraint could be released a bit to avoid such CI fail.