Add pipeline_artifacts_size to projectSatisticsType

Changelog: changed

app/graphql/types/project_statistics_type.rb

@@ -23,6 +23,8 @@ module Types
           description: 'Wiki size of the project in bytes.'
     field :snippets_size, GraphQL::FLOAT_TYPE, null: true,
           description: 'Snippets size of the project in bytes.'
+    field :pipeline_artifacts_size, GraphQL::FLOAT_TYPE, null: true,
+          description: 'CI Pipeline artifacts size in bytes.'
     field :uploads_size, GraphQL::FLOAT_TYPE, null: true,
           description: 'Uploads size of the project in bytes.'
   end

doc/api/graphql/reference/index.md

@@ -12965,6 +12965,7 @@ Represents a Project Membership.
 | <a id="projectstatisticscommitcount"></a>`commitCount` | [`Float!`](#float) | Commit count of the project. |
 | <a id="projectstatisticslfsobjectssize"></a>`lfsObjectsSize` | [`Float!`](#float) | Large File Storage (LFS) object size of the project in bytes. |
 | <a id="projectstatisticspackagessize"></a>`packagesSize` | [`Float!`](#float) | Packages size of the project in bytes. |
+| <a id="projectstatisticspipelineartifactssize"></a>`pipelineArtifactsSize` | [`Float`](#float) | CI Pipeline artifacts size in bytes. |
 | <a id="projectstatisticsrepositorysize"></a>`repositorySize` | [`Float!`](#float) | Repository size of the project in bytes. |
 | <a id="projectstatisticssnippetssize"></a>`snippetsSize` | [`Float`](#float) | Snippets size of the project in bytes. |
 | <a id="projectstatisticsstoragesize"></a>`storageSize` | [`Float!`](#float) | Storage size of the project in bytes. |

spec/graphql/types/project_statistics_type_spec.rb

@@ -6,6 +6,6 @@ RSpec.describe GitlabSchema.types['ProjectStatistics'] do
   it 'has all the required fields' do
     expect(described_class).to have_graphql_fields(:storage_size, :repository_size, :lfs_objects_size,
                                        :build_artifacts_size, :packages_size, :commit_count,
-                                       :wiki_size, :snippets_size, :uploads_size)
+                                       :wiki_size, :snippets_size, :pipeline_artifacts_size, :uploads_size)
   end
 end