#3194594 PagerSelectExtender::getElement() allows consuming code to know the pager id used by a query

from:
  fqn: '\Drupal\Core\Database\Query\PagerSelectExtender::$maxElement'
match_unresolved: true
to:
  fqn: '\Drupal\Core\Pager\PagerManagerInterface::getMaxPagerElementId'
match_unresolved: true
to:
  fqn: '\Drupal\Core\Database\Query\PagerSelectExtender::getElement'
match_unresolved: true
to:
  fqn: '\Drupal\Core\Pager\PagerManagerInterface::reservePagerElementId'
match_unresolved: true
to:
  fqn: '\Drupal\Core\Database\Connection::getPagerManager'