Swap FK ci_build_report_results to projects for LFK

Removes FK for ci_build_report_results to projects

Changelog: changed

db/post_migrate/20220113015830_remove_projects_ci_build_report_results_project_id_fk.rb

+# frozen_string_literal: true
+
+class RemoveProjectsCiBuildReportResultsProjectIdFk < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  def up
+    with_lock_retries do
+      remove_foreign_key_if_exists(:ci_build_report_results, :projects, name: "fk_rails_056d298d48")
+    end
+  end
+
+  def down
+    add_concurrent_foreign_key(:ci_build_report_results, :projects, name: "fk_rails_056d298d48", column: :project_id, target_column: :id, on_delete: "cascade")
+  end
+end

db/schema_migrations/20220113015830

+774a5ff616663d6d0e002bd04d33747982de10b02cbb9ad7d8abfe0b26a2b441
\ No newline at end of file

db/structure.sql

@@ -29951,9 +29951,6 @@ ALTER TABLE ONLY ip_restrictions
 ALTER TABLE ONLY terraform_state_versions
     ADD CONSTRAINT fk_rails_04f176e239 FOREIGN KEY (terraform_state_id) REFERENCES terraform_states(id) ON DELETE CASCADE;
 
-ALTER TABLE ONLY ci_build_report_results
-    ADD CONSTRAINT fk_rails_056d298d48 FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE;
-
 ALTER TABLE ONLY ci_daily_build_group_report_results
     ADD CONSTRAINT fk_rails_0667f7608c FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE;
 

lib/gitlab/database/gitlab_loose_foreign_keys.yml

+---
 dast_site_profiles_pipelines:
   - table: ci_pipelines
     column: ci_pipeline_id
@@ -46,6 +47,10 @@ ci_namespace_mirrors:
   - table: namespaces
     column: namespace_id
     on_delete: async_delete
+ci_build_report_results:
+  - table: projects
+    column: project_id
+    on_delete: async_delete
 ci_builds:
   - table: users
     column: user_id

spec/models/ci/build_report_result_spec.rb

@@ -5,6 +5,11 @@ require 'spec_helper'
 RSpec.describe Ci::BuildReportResult do
   let(:build_report_result) { build(:ci_build_report_result, :with_junit_success) }
 
+  it_behaves_like 'cleanup by a loose foreign key' do
+    let!(:parent) { create(:project) }
+    let!(:model) { create(:ci_build_report_result, project: parent) }
+  end
+
   describe 'associations' do
     it { is_expected.to belong_to(:build) }
     it { is_expected.to belong_to(:project) }