KIC Gateway API `RequestRedirect` filter implementation is missing `ReplacePreffixMatch` support

[fgiudici]

Current Behavior

ReplacePrefixMatch type for RequestRedirect filter is not honored.
Example HTTPRoute snippet:

kind: HTTPRoute
...
spec:
  rules:
    - matches:
        - path:
            type: PathPrefix
            value: /cayenne
      filters:
        - type: RequestRedirect
          requestRedirect:
            path:
              type: ReplacePrefixMatch
              replacePrefixMatch: /paprika

Expected Behavior

ReplacePrefixMatch type for RequestRedirect filter is honored.

Additional Notes

• there is no 1:1 mapping from HTTPRoute filter to KongPlugin to support this option.
• RequestRedirect filter belongs to the CORE Gateway API conformance level set.