Add city to IP-based geo (#11603)

src/geolocation/types.ts

@@ -1,6 +1,8 @@
 export type Geolocation = {
   countryCode: string | undefined
   regionCode: string | undefined
+  /** Only populated by the IP-based geolocation service. */
+  city?: string
   serviceGeolocation?: Geolocation
   deviceGeolocation?: Geolocation
 }