Modify the /eds/hydrology route to have a synonym route that is used by NCR

[BobTorgerson]

To allow for us to drop cache and recache only subsections of the API without impacting the rest of cache, we have double dipped on the /eds/hydrology endpoint which has resulted in when we drop cache for ArcticEDS, it also impacts the responsiveness of NCR.

Suggest adding something like:
@routes.route("/ncr/hydrology//") to the eds_hydrology_data function's available routes.

[brucecrevensten]

I think we want to be careful about adding synonyms but the overall idea here is good.