[FIX] http_routing: compat for werkzeug 2.2.x

The path matching logic got reimplemented in werkzeug 2.2[^1] and the
new router is no more compatible with regexp groups[^2]. Our custom
converter for slugged-records in urls (`'/partner/agrolait-5'` => `5`)
has been adapted to match the route using non-capturing groups. It still
extracts the slug/id pair using the groups-capturing regexp.

[^1]: https://github.com/pallets/werkzeug/pull/2433
[^2]: https://github.com/pallets/werkzeug/pull/2519

Part-of: odoo/odoo#112197