Update graphql statistics holders to BigInt

INT_TYPE can only hold 2**31 (?), which is not enough for large projects and root namespaces.

app/graphql/types/project_statistics_type.rb

@@ -6,20 +6,20 @@ module Types
 
     authorize :read_statistics
 
-    field :commit_count, GraphQL::INT_TYPE, null: false,
+    field :commit_count, GraphQL::Types::BigInt, null: false,
           description: 'Commit count of the project'
 
-    field :storage_size, GraphQL::INT_TYPE, null: false,
+    field :storage_size, GraphQL::Types::BigInt, null: false,
           description: 'Storage size of the project'
-    field :repository_size, GraphQL::INT_TYPE, null: false,
+    field :repository_size, GraphQL::Types::BigInt, null: false,
           description: 'Repository size of the project'
-    field :lfs_objects_size, GraphQL::INT_TYPE, null: false,
+    field :lfs_objects_size, GraphQL::Types::BigInt, null: false,
           description: 'Large File Storage (LFS) object size of the project'
-    field :build_artifacts_size, GraphQL::INT_TYPE, null: false,
+    field :build_artifacts_size, GraphQL::Types::BigInt, null: false,
           description: 'Build artifacts size of the project'
-    field :packages_size, GraphQL::INT_TYPE, null: false,
+    field :packages_size, GraphQL::Types::BigInt, null: false,
           description: 'Packages size of the project'
-    field :wiki_size, GraphQL::INT_TYPE, null: true,
+    field :wiki_size, GraphQL::Types::BigInt, null: true,
           description: 'Wiki size of the project'
   end
 end

app/graphql/types/root_storage_statistics_type.rb

@@ -6,11 +6,11 @@ module Types
 
     authorize :read_statistics
 
-    field :storage_size, GraphQL::INT_TYPE, null: false, description: 'The total storage in bytes'
-    field :repository_size, GraphQL::INT_TYPE, null: false, description: 'The Git repository size in bytes'
-    field :lfs_objects_size, GraphQL::INT_TYPE, null: false, description: 'The LFS objects size in bytes'
-    field :build_artifacts_size, GraphQL::INT_TYPE, null: false, description: 'The CI artifacts size in bytes'
-    field :packages_size, GraphQL::INT_TYPE, null: false, description: 'The packages size in bytes'
-    field :wiki_size, GraphQL::INT_TYPE, null: false, description: 'The wiki size in bytes'
+    field :storage_size, GraphQL::Types::BigInt, null: false, description: 'The total storage in bytes'
+    field :repository_size, GraphQL::Types::BigInt, null: false, description: 'The Git repository size in bytes'
+    field :lfs_objects_size, GraphQL::Types::BigInt, null: false, description: 'The LFS objects size in bytes'
+    field :build_artifacts_size, GraphQL::Types::BigInt, null: false, description: 'The CI artifacts size in bytes'
+    field :packages_size, GraphQL::Types::BigInt, null: false, description: 'The packages size in bytes'
+    field :wiki_size, GraphQL::Types::BigInt, null: false, description: 'The wiki size in bytes'
   end
 end