[ui5-proxy-middleware] FEATURE: Allow to specify pathReplace for /resources and /test-resources paths

[tavnabisoft]

Description

It's not possible to map ui5 resources paths to custom ones rather than /resources and /test-resources. The path taken from configuration->ui5->path is treated as string instead with no option to pass object mapping. This causes problems with overlapping libraries consumed by application/component, that are also exposed under /resources path, thus can't be consumed anymore.

What is expected is similar to pathReplace option in backend-proxy-middleware:

server:
  customMiddleware:
  - name: ui5-proxy-middleware
    afterMiddleware: compression
    configuration:
      ui5:
      - path: /ui5-resources
        pathReplace: /resources
        url: https://ui5.sap.com