Instead of updating the status array every time `operator()` is called,
we can instead update it once every time the entire array has been read.
That allows the compiler to vectorize the updating code, improving
performance.
Apple M4:
```
Benchmark old new Difference % Difference
---------------------------------------- ------- ------- ------------ --------------
std::mt19937::operator() 1.39 0.65 -0.74 -53.26%
std::mt19937::operator()_(into_array) 172.92 80.69 -92.23 -53.34%
std::mt19937_64::operator() 1.46 0.99 -0.47 -31.99%
std::mt19937_64::operator()_(into_array) 187.31 108.10 -79.21 -42.29%
```
Fixes#197221
Nikolas Klauser
925f4f27b7