Rename buildkite_service to buildkite_integration

Part of service => integration renaming effort

app/models/integration.rb

@@ -38,6 +38,12 @@ class Integration < ApplicationRecord
     Integrations::BaseSlashCommands
   ].freeze
 
+  # used as part of the renaming effort (https://gitlab.com/groups/gitlab-org/-/epics/2504)
+  RENAMED_TO_INTEGRATION = %w[
+    asana assembla
+    bamboo bugzilla buildkite
+  ].to_set.freeze
+
   serialize :properties, JSON # rubocop:disable Cop/ActiveRecordSerialize
 
   attribute :type, Gitlab::Integrations::StiType.new
@@ -228,9 +234,6 @@ class Integration < ApplicationRecord
     service_names.sort_by(&:downcase)
   end
 
-  # used as part of the renaming effort
-  RENAMED_TO_INTEGRATION = %w[asana assembla bamboo bugzilla].freeze
-
   def self.available_integration_names(**args)
     available_services_names(**args)
       .select { RENAMED_TO_INTEGRATION.include?(_1) }

app/models/project.rb

@@ -159,7 +159,7 @@ class Project < ApplicationRecord
   has_one :assembla_integration, class_name: 'Integrations::Assembla'
   has_one :bamboo_integration, class_name: 'Integrations::Bamboo'
   has_one :bugzilla_integration, class_name: 'Integrations::Bugzilla'
-  has_one :buildkite_service, class_name: 'Integrations::Buildkite'
+  has_one :buildkite_integration, class_name: 'Integrations::Buildkite'
   has_one :campfire_service, class_name: 'Integrations::Campfire'
   has_one :confluence_service, class_name: 'Integrations::Confluence'
   has_one :custom_issue_tracker_service, class_name: 'Integrations::CustomIssueTracker'

spec/lib/gitlab/import_export/all_models.yml

@@ -383,7 +383,7 @@ project:
 - mattermost_service
 - hangouts_chat_service
 - unify_circuit_service
-- buildkite_service
+- buildkite_integration
 - bamboo_integration
 - teamcity_service
 - pushover_service

spec/models/project_spec.rb

@@ -57,7 +57,7 @@ RSpec.describe Project, factory_default: :keep do
     it { is_expected.to have_one(:assembla_integration) }
     it { is_expected.to have_one(:slack_slash_commands_service) }
     it { is_expected.to have_one(:mattermost_slash_commands_service) }
-    it { is_expected.to have_one(:buildkite_service) }
+    it { is_expected.to have_one(:buildkite_integration) }
     it { is_expected.to have_one(:bamboo_integration) }
     it { is_expected.to have_one(:teamcity_service) }
     it { is_expected.to have_one(:jira_service) }