Update RNG seeding to use stronger seeds
Update of the RNG seeding in master together with a test that calcualtes how often seeds are re-used. The current standard seeding leads to the same seed being used by the random number generator in up to 0.3% of cases, see ATLASSIM-5338. The new seeding method leads to a substantilly reduced rate of producing the same seeds. This MR is a copy of !46194 (merged) and needs to be merged as the only MR for a specific nightly. See the discussion in !46194 (merged) for the past review