Provide route decorator similar to Grafana Beyla

[titaneric]

Request

Hi, I would like to request a new feature called route decorator similar to Grafana Beyla. It works like this (in Beyla config)

routes:
  patterns:
    - /user/{id}
    - /user/{id}/basket/{product}

and it would match /user/123 and /user/456 and it would include /user/{id} in the trace property.

Hope that there is a URL parsing function or a dedicated block called matchRoute in log.process component to process the HTTP path like this.

Indeed, we have regex and replace block in log.process component. However, it's not powerful enough.

Use case

Like I mentioned in #1592, I would to pre-process the performance resource metrics sent by Faro SDK. There is a event_data field in the faro.receiver log and it would have the full path of HTTP request. I want to remove any parameters, hostname, and any GET single resource (/user/{id}) before sending to Grafana Loki. By configuring these, I could transform the logql query into Prometheus metrics by Loki rulers.