Name already in use

This PR adds the benchmarking script I've been using for #40251 to
measure the performance improvements that we make to the Edge SSR
runtime.

This tool:
- uploads two version of the benchmarking project to Vercel, one with
the latest canary and the one with your current local changes in dist
(don't forget to build!)
- runs some tests against the published url to measure TTFB
- displays a nice chart and table

What this doesn't do (yet):

- allow you to choose which URL to compare
- allow you to change the measured metric
- run a battery of differnet test


## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have a helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the
feature request has been accepted for implementation before opening a
PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have a helpful link attached, see `contributing.md`


https://user-images.githubusercontent.com/11064311/191270204-04447e20-5a40-43a9-bcda-b7eaeb3d270a.mov


## Documentation / Examples

- [ ] Make sure the linting passes by running `pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>