Rename failure reason to be more descriptive

ee/app/models/ee/commit_status_enums.rb

@@ -16,7 +16,7 @@ module EE
                     upstream_bridge_project_not_found: 1_004,
                     insufficient_upstream_permissions: 1_005,
                     bridge_pipeline_is_child_pipeline: 1_006,
-                    downstream_bridge_pipeline_creation_failed: 1_007)
+                    downstream_pipeline_creation_failed: 1_007)
       end
     end
   end

ee/app/presenters/ee/commit_status_presenter.rb

@@ -12,7 +12,7 @@ module EE
         upstream_bridge_project_not_found: 'This job could not be executed because upstream bridge project could not be found.',
         invalid_bridge_trigger: 'This job could not be executed because downstream pipeline trigger definition is invalid.',
         bridge_pipeline_is_child_pipeline: 'This job belongs to a child pipeline and cannot create further child pipelines.',
-        downstream_bridge_pipeline_creation_failed: 'The downstream project pipeline could not be created.'
+        downstream_pipeline_creation_failed: 'The downstream pipeline could not be created.'
       ).freeze
 
       EE::CommitStatusPresenter.private_constant :EE_CALLOUT_FAILURE_MESSAGES

ee/app/services/ci/create_cross_project_pipeline_service.rb

@@ -30,7 +30,7 @@ module Ci
         end
 
       downstream_pipeline.tap do |pipeline|
-        @bridge.drop!(:downstream_bridge_pipeline_creation_failed) if pipeline.has_yaml_errors?
+        @bridge.drop!(:downstream_pipeline_creation_failed) if pipeline.has_yaml_errors?
       end
     end
 

ee/lib/ee/gitlab/ci/status/build/failed.rb

@@ -17,7 +17,7 @@ module EE
                 insufficient_bridge_permissions: 'no permissions to trigger downstream pipeline',
                 insufficient_upstream_permissions: 'no permissions to read upstream project',
                 bridge_pipeline_is_child_pipeline: 'creation of child pipeline not allowed from another child pipeline',
-                downstream_bridge_pipeline_creation_failed: 'downstream bridge pipeline can not be created'
+                downstream_pipeline_creation_failed: 'downstream pipeline can not be created'
               ).freeze
               EE::Gitlab::Ci::Status::Build::Failed.private_constant :EE_REASONS
             end

ee/spec/services/ci/create_cross_project_pipeline_service_spec.rb

@@ -265,6 +265,7 @@ describe Ci::CreateCrossProjectPipelineService, '#execute' do
 
         expect(pipeline.reload).to be_failed
         expect(bridge.reload).to be_failed
+        expect(bridge.failure_reason).to eq('downstream_pipeline_creation_failed')
       end
     end