Migrate steiner_tree() and metric_closure() to rustworkx-core

[mtreinish]

What is the expected enhancement?

The metric_closure() and steiner_tree() functions available at: https://github.com/Qiskit/rustworkx/blob/main/src/steiner_tree.rs should be straightforward to port to rustworkx-core and rework as generic for any petgraph graph and then update the python functions to call the inner rustworkx-core function. This will then expose this functionality to any rust users that might want this functionality.

[tapanih]

I noticed that metric_closure uses all_pairs_dijkstra_shortest_paths so that function needs to be moved as well.

[yoshida-ryuhei]

Can I be assigned to this?

[mtreinish]

Sure thing, I've assigned the issue to you

[yoshida-ryuhei]

Thank you.
I am going to implement this patch!

[mtreinish]

This was implemented in #1103