UI: Refactor duplicated logic to grab active hotlines

[deepanchal]

Description

Replace this logic with reusable hook/util in the repo:

const ccuApi = useApi();
const fieldsToFetch = [
  'id',
  'name',
  'short_name',
  'active_phone_number',
  'start_at',
];
const { isDataLoading, data } = ccuApi(
  '/incidents?fields=id,name,short_name,active_phone_number&limit=200&sort=-start_at',
  {
    method: 'GET',
    params: {
      fields: fieldsToFetch.join(','),
      limit: 200,
      sort: '-start_at',
    },
  },
);
const incidentList = computed(() => data.value?.results);
function getIncidentPhoneNumbers(incident) {
  if (Array.isArray(incident.active_phone_number)) {
    return incident.active_phone_number
      .map((number) => formatNationalNumber(String(number)))
      .join(', ');
  }
  return formatNationalNumber(String(incident.active_phone_number));
}
function filterNumbers(item) {
  return item.filter((filterItem) => filterItem.active_phone_number);
}