Added type annotations to some GraphQL resolvers

These have been added to commit pipelines resolver
and the merge request pipelines resolver

.rubocop_manual_todo.yml

@@ -43,11 +43,8 @@ Graphql/ResolverType:
   Exclude:
     - 'app/graphql/resolvers/base_resolver.rb'
     - 'app/graphql/resolvers/ci/pipeline_stages_resolver.rb'
-    - 'app/graphql/resolvers/commit_pipelines_resolver.rb'
     - 'app/graphql/resolvers/error_tracking/sentry_error_stack_trace_resolver.rb'
-    - 'app/graphql/resolvers/merge_request_pipelines_resolver.rb'
     - 'app/graphql/resolvers/merge_requests_resolver.rb'
-    - 'app/graphql/resolvers/project_pipelines_resolver.rb'
     - 'app/graphql/resolvers/users/group_count_resolver.rb'
     - 'ee/app/graphql/resolvers/ci/jobs_resolver.rb'
     - 'ee/app/graphql/resolvers/geo/merge_request_diff_registries_resolver.rb'

app/graphql/resolvers/commit_pipelines_resolver.rb

 # frozen_string_literal: true
+# rubocop: disable Graphql/ResolverType
 
 module Resolvers
   class CommitPipelinesResolver < BaseResolver
+    # The GraphQL type here gets defined in this include
     include ::ResolvesPipelines
 
     alias_method :commit, :object
@@ -11,3 +13,4 @@ module Resolvers
     end
   end
 end
+# rubocop: enable Graphql/ResolverType

app/graphql/resolvers/concerns/resolves_pipelines.rb

@@ -4,7 +4,7 @@ module ResolvesPipelines
   extend ActiveSupport::Concern
 
   included do
-    type [Types::Ci::PipelineType], null: false
+    type Types::Ci::PipelineType.connection_type, null: false
     argument :status,
              Types::Ci::PipelineStatusEnum,
              required: false,

app/graphql/resolvers/merge_request_pipelines_resolver.rb

 # frozen_string_literal: true
+# rubocop: disable Graphql/ResolverType
 
 module Resolvers
   class MergeRequestPipelinesResolver < BaseResolver
+    # The GraphQL type here gets defined in this include
     include ::ResolvesPipelines
 
     alias_method :merge_request, :object
@@ -18,3 +20,4 @@ module Resolvers
     end
   end
 end
+# rubocop: enable Graphql/ResolverType

app/graphql/resolvers/project_pipelines_resolver.rb

 # frozen_string_literal: true
+# The GraphQL type here gets defined in
+# https://gitlab.com/gitlab-org/gitlab/blob/master/app/graphql/resolvers/concerns/resolves_pipelines.rb#L7
+# rubocop: disable Graphql/ResolverType
 
 module Resolvers
   class ProjectPipelinesResolver < BaseResolver
@@ -22,3 +25,4 @@ module Resolvers
     end
   end
 end
+# rubocop: enable Graphql/ResolverType

app/graphql/types/commit_type.rb

@@ -40,7 +40,7 @@ module Types
     field :author, type: Types::UserType, null: true,
           description: 'Author of the commit'
 
-    field :pipelines, Types::Ci::PipelineType.connection_type,
+    field :pipelines,
           null: true,
           description: 'Pipelines of the commit ordered latest first',
           resolver: Resolvers::CommitPipelinesResolver

app/graphql/types/merge_request_type.rb

@@ -114,7 +114,7 @@ module Types
 
     field :head_pipeline, Types::Ci::PipelineType, null: true, method: :actual_head_pipeline,
           description: 'The pipeline running on the branch HEAD of the merge request'
-    field :pipelines, Types::Ci::PipelineType.connection_type,
+    field :pipelines,
           null: true,
           description: 'Pipelines for the merge request',
           resolver: Resolvers::MergeRequestPipelinesResolver

app/graphql/types/project_type.rb

@@ -187,7 +187,6 @@ module Types
          resolver: Resolvers::PackagesResolver
 
     field :pipelines,
-          Types::Ci::PipelineType.connection_type,
           null: true,
           description: 'Build pipelines of the project',
           extras: [:lookahead],