I recently published https://github.com/marketplace/actions/run-pyright, which wraps pyright and uses GHA magic to leave diagnostics on commits / PRs (like https://github.com/jakebailey/pyright-action-test/pull/1/files), plus a faster startup time thanks to GHA tool caching and piggy backing off of the `node` install used in GHA itself (so no `setup-node` needed).
This PR switches to that action and leaves a comment noting that the version number is pinned in two places.
This action is a prototype, but I'm pretty confident in it so far.
Update pyright CI test to use the latest version of pyright (1.1.118). Enable all but one of pyright's strictest checks. Add a "# type: ignore" to `__new__` method in `weakref.KeyRef` because it uses a non-standard name for the `cls` parameter, which is flagged as an error by pyright.
Co-authored-by: Eric Traut <erictr@microsoft.com>
