Kevin Obrejan

Optimisation of the solid angle computation with aperture obstruction

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This PR is a follow up to #663 providing major performance improvement to all to the 3 functions `compute_solid_angle_apertures_light*` (which have also all been merged into one) thanks to: -...

### Current Implementation PR #309, which introduced the gyroverage operator, included the 2 non-regression tests `GyroAverageCircularParamTests` and `GyroAverageCircularParamTests` but the latter was later deactivated in #369 because of portability issues...