Support for excluding sub-paths in path-based routing predicates

Is your feature request related to a problem? Please describe.
Hi team,

While configuring path-based routing, I noticed that there doesn't seem to be a built-in way to exclude specific paths from matching a route (e.g. applying a filter to /api/** but excluding /api/health).

Is there currently a recommended way to handle such exclusions within a route definition or filter configuration?
If not, would it be possible to consider supporting a feature that allows excluding certain sub-paths from a path predicate or filter?

If this feature is already planned or would be a welcome addition, I’d be happy to explore contributing a PR to help implement it.

Thanks!

Example (conceptual configuration):

- id: api
  uri: https://external-system
  predicates:
    - Path=/api/**
    - ExcludePath=/api/health  # hypothetical example

The issue names no files or tests; start by reviewing path-based routing predicates and filter configuration, using the conceptual YAML example as the starting point. Done means a route can match /api/** while excluding /api/health, with the supported configuration and resulting behavior verified.