GREG-154: Add gender field

The field is showing when the institution is UiB.

frontend/public/locales/en/common.json

@@ -23,7 +23,10 @@
     "passportNumber": "Passport number",
     "passportNationality": "Passport nationality",
     "countryCallingCode": "Country code",
-    "contactPersonUnit": "Contact at unit"
+    "contactPersonUnit": "Contact at unit",
+    "gender": "Gender",
+    "male": "Male",
+    "female": "Female"
   },
   "sponsor": {
     "addRole": "Add role",