Move shared alert graphql resources to shared

...ts/alert_management/components/alert_management_table.vue

.../javascripts/alert_management/components/alert_status.vue

...management/graphql/fragments/detail_item.fragment.graphql

...nt/graphql/mutations/alert_set_assignees.mutation.graphql

...vascripts/graphql_shared/fragments/alert.fragment.graphql

...ipts/graphql_shared/fragments/alert_note.fragment.graphql

...hql_shared/mutations/update_alert_status.mutation.graphql

...vascripts/graphql_shared/queries/get_alerts.query.graphql

...ipts/threat_monitoring/components/alerts/alert_status.vue

...ripts/threat_monitoring/components/alerts/alerts_list.vue

.../threat_monitoring/components/alerts/alert_status_spec.js

...frontend/alert_management/components/alert_status_spec.js

...anagement/components/sidebar/alert_sidebar_status_spec.js