Estimate effective computational complexity for hctsa operators

[sdvillal]

How long will it take this operator call? We should have a way to answer this from the catalog. We can keep with the (quite wrong) assumption that this depend only on the length of the time series and have a benchmark infer the time-complexity.

We could also add a second dimension (type of time series) and either have a fast way to make the correspondand for a new time series or, simpler, just use the average to better infer the time complexity.

A possible workaround to avoid a few feature computations to slow down everything would be to include timeouts. I think that would be quite complex.