UserID: allow any contents in EIDs

[dgirardi]

Type of change

• Feature

Description of change

This allows ID modules to provide a single EID generation function instead of current mix (getValue, getUidExt, etc), which in turn also enables them to fill in some currently unsupported fields (inserter, matcher and mm).

The function is passed two arguments (values, config) and should return one or more EID objects. values is an array with IDs as returned by the submodule's decode, and config is the module's configuration.

For example, a definition like

Prebid.js/libraries/liveIntentId/shared.js

Lines 135 to 148 in ea87c0e

	'lipb': {
	getValue: function(data) {
	return data.lipbid;
	},
	source: 'liveintent.com',
	atype: 3,
	getEidExt: function(data) {
	if (Array.isArray(data.segments) && data.segments.length) {
	return {
	segments: data.segments
	};
	}
	}
	},

could be translated like so:

    libp(values) {
        return values.map(data => {
            const eid = {
                source: 'liveintent.com',
                uids: [{
                    id: data.libpid,
                    atype: 3
                }]
            }
            if (Array.isArray(data.segments) && data.segments.length) {
                eid.ext = {
                    segments: data.segments
                }
            }
            return eid;
        })
    }

Other information

Related to #12641