erfInv is very inneficient

[JeWaVe]

System Information (please complete the following information):

• OS & Version: Any
• ML.NET Version: latest
• .NET Version: [e.g. .NET 5.0]any

Describe the bug
In ProbabilityFunctions.cs, there are these lines :

// This is very inefficient... fortunately we only need to compute it very infrequently.
double[] c = new double[1000];
c[0] = 1;
for (int k = 1; k < c.Length; ++k)
{
for (int m = 0; m < k; ++m)
c[k] += c[m] * c[k - 1 - m] / (m + 1) / (m + m + 1);
}

even if the class is internal, this is very inefficient (as written in the code), and could be called somewhere else

To Reproduce

1. Open ProbabilityFunctions.cs
2. go to line 74

Expected behavior
A precomputed table, or a once-and-for-all computed table