Add specs for ExternalAuditEventDestinationType

Additionally, moves ExternalAuditEventDestinationType class
to EE, rather than the EE overrides since there is no CE class.

ee/app/graphql/ee/types/audit_events/external_audit_event_destination_type.rb

-# frozen_string_literal: true
-
-module EE
-  module Types
-    module AuditEvents
-      class ExternalAuditEventDestinationType < ::Types::BaseObject
-        graphql_name 'ExternalAuditEventDestination'
-        description 'Represents an external resource to send audit events to'
-
-        field :id, GraphQL::Types::ID,
-              null: false,
-              description: 'ID of the destination.'
-
-        field :destination_url, GraphQL::Types::String,
-              null: false,
-              description: 'External destination to send audit events to.'
-
-        field :group, ::Types::GroupType,
-              null: false,
-              description: 'Group the destination belongs to.'
-
-        field :verification_token, GraphQL::Types::String,
-              null: false,
-              description: 'Verification token to validate source of event.'
-      end
-    end
-  end
-end

ee/app/graphql/ee/types/group_type.rb

@@ -94,7 +94,7 @@ module EE
               description: "Group's DORA metrics."
 
         field :external_audit_event_destinations,
-              EE::Types::AuditEvents::ExternalAuditEventDestinationType.connection_type,
+              ::Types::AuditEvents::ExternalAuditEventDestinationType.connection_type,
               null: true,
               description: 'External locations that receive audit events belonging to the group.',
               authorize: :admin_external_audit_events

ee/app/graphql/mutations/audit_events/external_audit_event_destinations/create.rb

@@ -16,7 +16,7 @@ module Mutations
                  required: true,
                  description: 'Group path.'
 
-        field :external_audit_event_destination, EE::Types::AuditEvents::ExternalAuditEventDestinationType,
+        field :external_audit_event_destination, ::Types::AuditEvents::ExternalAuditEventDestinationType,
               null: true,
               description: 'Destination created.'
 

ee/app/graphql/mutations/audit_events/external_audit_event_destinations/update.rb

@@ -16,7 +16,7 @@ module Mutations
                  required: false,
                  description: 'Destination URL to change.'
 
-        field :external_audit_event_destination, EE::Types::AuditEvents::ExternalAuditEventDestinationType,
+        field :external_audit_event_destination, ::Types::AuditEvents::ExternalAuditEventDestinationType,
               null: true,
               description: 'Updated destination.'
 

ee/app/graphql/types/audit_events/external_audit_event_destination_type.rb

+# frozen_string_literal: true
+
+module Types
+  module AuditEvents
+    class ExternalAuditEventDestinationType < ::Types::BaseObject
+      graphql_name 'ExternalAuditEventDestination'
+      description 'Represents an external resource to send audit events to'
+      authorize :admin_external_audit_events
+
+      field :id, GraphQL::Types::ID,
+            null: false,
+            description: 'ID of the destination.'
+
+      field :destination_url, GraphQL::Types::String,
+            null: false,
+            description: 'External destination to send audit events to.'
+
+      field :group, ::Types::GroupType,
+            null: false,
+            description: 'Group the destination belongs to.'
+
+      field :verification_token, GraphQL::Types::String,
+            null: false,
+            description: 'Verification token to validate source of event.'
+    end
+  end
+end

ee/spec/graphql/types/audit_events/exterrnal_audit_event_destination_type_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GitlabSchema.types['ExternalAuditEventDestination'] do
+  let(:fields) do
+    %i[id destination_url group verification_token]
+  end
+
+  specify { expect(described_class.graphql_name).to eq('ExternalAuditEventDestination') }
+  specify { expect(described_class).to have_graphql_fields(fields) }
+  specify { expect(described_class).to require_graphql_authorizations(:admin_external_audit_events) }
+end