`Ci::JobArtifact#update_project_statistics` fails because of statement timeout

ActiveRecord::StatementInvalid: PG::QueryCanceled: ERROR: canceling statement due to statement timeout

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https://sentry.gitlab.net/gitlab/gitlabcom/issues/476076/

PG::QueryCanceled: ERROR:  canceling statement due to statement timeout
CONTEXT:  while updating tuple (47177,46) in relation "project_statistics"

  peek/views/pg.rb:17:in `async_exec'
    super(*args)
  peek/views/pg.rb:17:in `async_exec'
    super(*args)
  active_record/connection_adapters/postgresql_adapter.rb:592:in `block in exec_no_cache'
    log(sql, name, binds) { @connection.async_exec(sql, []) }
  active_record/connection_adapters/abstract_adapter.rb:484:in `block in log'
    :binds          => binds) { yield }
  active_support/notifications/instrumenter.rb:20:in `instrument'
    yield payload
...
(250 additional frame(s) were not displayed)

ActiveRecord::StatementInvalid: PG::QueryCanceled: ERROR:  canceling statement due to statement timeout
CONTEXT:  while updating tuple (47177,46) in relation "project_statistics"
: UPDATE "project_statistics" SET build_artifacts_size = COALESCE(build_artifacts_size, 0) + (12566722), storage_size = COALESCE(storage_size, 0) + (12566722) WHERE "project_statistics"."project_id" = 2648174

ActiveRecord::StatementInvalid: PG::QueryCanceled: ERROR:  canceling statement due to statement timeout
CONTEXT:  while updating tuple (47177,46) in relation "project_statistics"
: UPDATE "project_statistics" SET build_artifacts_size = COALESCE(build_artifacts_size, 0) + (12566722), storage_size = COALESCE(storage_size, 0) + (12566722) WHERE "project_statistics"."project_id" = 2648174