Added L2 Squared Distance and Norm Functions for Arrays and Tuples

Why it matters

These new functions provide a straightforward way to compute the L2 Squared distance and norms directly within ClickHouse, enabling more efficient and accurate vector computations for array and tuple data types. This feature is valuable for analytics and machine learning tasks where such distance metrics are commonly used.

How to use it

You can use the new functions by passing either arrays or tuples as arguments. For example, use L2SquaredDistance(array1, array2) to calculate the squared L2 distance between two arrays, or L2Norm(array_or_tuple) to compute the L2 norm of a single array or tuple.