`use_grib_paramid` only works for ECMWF definitions

[frazane]

A config option use_grib_paramid is provided to specify whether a param ID, instead of the param/shortName key, should be used when requesting data e.g. from MARS or FDB.

The mapping between a parameter name and its ID is handled in anemoi-utils. However, it relies on the ECMWF parameter database

anemoi-utils/src/anemoi/utils/grib.py

Line 36 in 2837ecd

def _search_param(name):

and therefore will not work if one is using locally defined parameters.

[HCookie]

Transferred here, as the issue is within a utility function.
Potentially some ability to override the database location is needed.