Enable wildcard namespace definition when setting namespace RPS

Is your feature request related to a problem? Please describe.
It seems there is a way of setting namespace RPS limits as outlined here. To enable a more dynamic approach, it would be useful to be able to define wildcard rules that get applied to namespaces (e.g. stg-* means any namespaces matching this rule such as stg-test will have this rule applied to it).

Describe the solution you'd like
Current functionality:

frontend.namespacerps:
- value: 2000
- value: 100
  constraints:
    namespace: "namespaceA"
- value: 500
  constraints:
    namespace: "namespaceB"

Requested functionality:

frontend.namespacerps:
- value: 1000
- value: 500
  constraints:
    namespace: "stg-*"
- value: 600
  constraints:
    namespace: "prod-*"

Describe alternatives you've considered
The alternative here is updating the server config every time a new namespace is added to which we want to apply RPS limits. The proposed approach can allow a more generic configuration of RPS limits to namespaces.

Additional context
N/A

No implementation files or tests are named in the issue. Start by tracing the frontend.namespacerps configuration and namespace RPS matching behavior, then identify where namespace constraints are evaluated. Done means wildcard rules such as stg-* and prod-* apply to matching namespaces without per-namespace configuration updates, with coverage for matching and non-matching names.