Share admission control filter across routes

[amorimdecoelho]

Is your feature request related to a problem? Please describe.
Currently, the admission control filter can be used for load shedding and protecting some resources. Some applications have multiple routes, which could be grouped by impacted resources. It's not currently possible to benefit from this resource grouping and each route creates its own admission control filter, having its own counters, making the setup more complex, e.g. min rps, and enabling a situation in which only a few routes of the same resource are being load shedded.

Describe the solution you would like
It should be possible to share an admission control filter across routes, e.g. by specifying a group id shared among admission control filters, indicating that they share the same counters / are the same instance.

Describe alternatives you've considered (optional)

Additional context (optional)

Would you like to work on it?
No