Add fixtures to create self monitoring project

Add production and development fixtures to ensure that the self
monitoring project is automatically created for new GitLab
installations.

changelogs/unreleased/208454-create-self-monitor-project-on-new-install.yml

+---
+title: Automatically create self monitoring project on new GitLab installations
+merge_request: 40404
+author:
+type: changed

db/fixtures/development/98_gitlab_instance_administration_project.rb

+# frozen_string_literal: true
+
+response = ::Gitlab::DatabaseImporters::SelfMonitoring::Project::CreateService.new.execute
+
+if response[:status] == :success
+  puts "Successfully created self monitoring project."
+else
+  puts "Could not create self monitoring project due to error: '#{response[:message]}'"
+  puts "Check logs for more details."
+end

db/fixtures/production/998_gitlab_instance_administration_project.rb

+# frozen_string_literal: true
+
+::Gitlab::DatabaseImporters::SelfMonitoring::Project::CreateService.new.execute
+
+if response[:status] == :success
+  puts "Successfully created self monitoring project."
+else
+  puts "Could not create self monitoring project due to error: '#{response[:message]}'"
+  puts "Check logs for more details."
+end