Add a page to describe the bench code we have. #17810
Description
When I review the PR, I found it introduced a cool benchmark for arithmetic_overflow_checking.
I'm thinking we already have many kinds of benchmarks for different module code in the codebase, it would be great to have a page in our website to describe each benchmark, then contributor may leverage them to move PR forward or easy to find new place to add new benchmark code.
For the specific place, it could be like testing, we can have a [benchmarking] page.