The text_with_summary plugins have been deprecated and moved to a new deprecated module 'text_with_summary'. That module will be removed from core in Drupal 12.
If you want to keep using the functionality provided by the text_with_summary pluging, read the recommendations for Text with Summary.
The following classes have moved:
Drupal\text\Plugin\Field\FieldFormatter\TextSummaryOrTrimmedFormatter => Drupal\text_with_summary\Plugin\Field\FieldFormatter\TextSummaryOrTrimmedFormatter
Drupal\text\Plugin\Field\FieldType\TextWithSummaryItem => Drupal\text_with_summary\Plugin\Field\FieldType\TextWithSummaryItem
Drupal\text\Plugin\Field\FieldWidget\TextareaWithSummaryWidget => Drupal\text_with_summary\Plugin\Field\FieldWidget\TextareaWithSummaryWidget
Additionally, text/drupal.text library has been moved to text_with_summary/drupal.text.
