BUG: Benchmarking does not work with spin

[Kai-Striega]

Describe the issue:

Running the benchmarks does not work since the project moved to spin/conda. The code needs to be updated to use the scientific Python ecosytem's tooling.

Reproduce the code example:

spin bench

Error message:

Usage: spin [OPTIONS] COMMAND [ARGS]...
Try 'spin --help' for help.

Error: No such command 'bench'.

Runtime information:

Working on the current main branch

Context for the issue:

We've recently moved to using conda/spin to build our projects. However the benchmarks haven't been ported yet.