ISTWCMS-7275: Rename "publication" to "reference" in custom block.

Updated class and form names, admin labels, and text strings to replace "publication" with "reference" for consistency and clarity in the custom block functionality. This aligns terminology with its intended purpose.

uw_custom_blocks.post_update.php

@@ -8,7 +8,7 @@
 /**
  * Updating the title for "references" layout builder blocks titles.
  */
-function uw_custom_blocks_post_update_references_block_titles_updates_16(&$sandbox) {
+function uw_custom_blocks_post_update_references_block_titles_updates(&$sandbox) {
   $query = \Drupal::entityQuery('node');
   $all_nodes = $query->accessCheck(FALSE)->sort('nid')->execute();
   $count = count($all_nodes);
@@ -170,12 +170,11 @@ function _references_block_titles_updates_batch_temp_storage(&$context) {
  *   about nodes and revisions processed during the batch operation.
  */
 function _references_block_titles_updates_batch_end(&$context) {
-  $context['message'] = t('Updated @nodes_updated/@nodes_processed (total @total nodes).', [
+  $context['message'] = t('Successfully updated @nodes_updated/@nodes_processed.', [
     '@nodes_updated' => $context['results']['nodes_updated'],
     '@nodes_processed' => $context['results']['nodes_processed'],
-    '@total' => $context['results']['nodes_count'],
   ]);
-  $context['message'] = t('Updated @revisions_updated/@revisions_processed revisions.', [
+  $context['message'] = t('Successfully updated @revisions_updated/@revisions_processed revisions.', [
     '@revisions_updated' => $context['results']['revisions_updated'],
     '@revisions_processed' => $context['results']['revisions_processed'],
   ]);