Refactor Axios usage in modules/FacetedSearchSettingsModule.ts to REST Module

[edalex-ian]

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

modules/FacetedSearchSettingsModule.ts has a number of direct Axios usages which should be moved to the REST module (oeq-ts-rest-api).

Describe the solution you'd like

• Create FacetedSearchSettings.ts in REST Module with the functions:
  • getFacets
  • batchUpdateOrAddFacets - NOTE: FacetWithFlags however should not be used outside of the front-end
  • batchDeleteFacets
• Update FacetedSearchSettingsModule.ts to use the REST Module functions

Additional context

There are a number of modules that require this, each will have its own ticket.

There is some interesting overlap here with the batch operations also found in the SearchFilterSettingsModule. Whether some consideration needs to be given to that in the REST module I'm not sure.