ISTWCMS-7275: Rename function and refine batch update messages

Renamed `uw_custom_blocks_post_update_references_block_titles_updates_16` for clarity and removed unused placeholders in batch end messages. Improved user feedback by simplifying and streamlining update messages for nodes and revisions.

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'],
   ]);