Add new match for jira connect serializers

This adds a match for the `JiraConnect` serializers to generate an
Integrations (backend) roulette reviewer recommendation as well as a
regular backend recommendation.

spec/tooling/danger/project_helper_spec.rb

@@ -217,6 +217,7 @@ RSpec.describe Tooling::Danger::ProjectHelper do
       'ee/lib/ee/gitlab/integrations/sti_type.rb' | [:integrations_be, :backend]
       'ee/lib/ee/api/helpers/integrations_helpers.rb' | [:integrations_be, :backend]
       'ee/app/serializers/integrations/jira_serializers/issue_entity.rb' | [:integrations_be, :backend]
+      'app/serializers/jira_connect/app_data_serializer.rb' | [:integrations_be, :backend]
       'lib/api/github/entities.rb' | [:integrations_be, :backend]
       'lib/api/v3/github.rb' | [:integrations_be, :backend]
       'app/models/clusters/integrations/elastic_stack.rb' | [:backend]

tooling/danger/project_helper.rb

@@ -53,7 +53,7 @@ module Tooling
         %r{\A(
           ((ee|jh)/)?app/((?!.*clusters)(?!.*alert_management)(?!.*views)(?!.*assets).+/)?integration.+ |
           ((ee|jh)/)?app/((?!.*search).+/)?project_service.+ |
-          ((ee|jh)/)?app/(models|helpers|workers|services|controllers)/(.+/)?(jira_connect.+|.*hook.+) |
+          ((ee|jh)/)?app/(models|helpers|workers|services|serializers|controllers)/(.+/)?(jira_connect.+|.*hook.+) |
           ((ee|jh)/)?app/controllers/(.+/)?oauth/jira/.+ |
           ((ee|jh)/)?app/services/(.+/)?jira.+ |
           ((ee|jh)/)?app/workers/(.+/)?(propagate_integration.+|irker_worker\.rb) |