Thread safety crash when launching noises from background thread.

[vblanco20-1]

With std::shared ptr option on or off. Doesnt matter. Happens randomly.

Seems to be related to https://github.com/Auburn/FastNoise2/issues/100 which happens again.

To replicate: Use taskflow or other similar parallel lib to launch multiple generators at once, in my project im launching 4 tasks to do noises at the same time. It seems initialization of simd structures causes a race condition. Currently debugging what is going on here to add more info to this issue.