fix(ci): sightcalibrator test randomly fails
Description
The computed calibration is sometimes wrong, see for instance :
This seems to be a timing issue.
Steps to reproduce
I was able to reproduce it locally by executing the test with a heavy load (build of Sight for instance).
Proposal
Tested value seems not equal to the ones I've got locally.
Functional specifications
Test should always return the same value of calibration.
Technical specifications
Check first if calibration method in OpenCV should return the exact same results or if there is some random.
Test plan
Local + CI on all OS.