[FEA]: Add Cosine Similarity to cuGraph

[acostadon]

Add a Cosine similarity metric to cuGraph

Example: https://docs.tigergraph.com/graph-ml/current/similarity-algorithms/cosine-similarity-of-neighborhoods-single-source

This is related to question issue #2979

Jaccard similarity is then given by 𝐽(𝐴,𝐵)=|𝐴∩𝐵| / |𝐴∪𝐵|

Cosine similarity is then given by 𝐶(𝐴,𝐵)=|𝐴∩𝐵| / SQR(|A||B|)

[ChuckHastings]

C++ implementation is done. Need to add support for PLC and python