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

@@ -62,7 +62,7 @@ function _references_block_titles_updates_batch_start($count, &$context): void {
   $context['results']['revisions_updated'] = 0;
   $context['results']['temp_storage_updated'] = 0;
 
-  $context['message'] = t("Processing @count nodes and each node revisions.", ['@count' => $count]);
+  $context['message'] = t("References: processing @count nodes and each node revisions.", ['@count' => $count]);
 }
 
 /**
@@ -157,7 +157,7 @@ function _references_block_titles_updates_batch_update($nid, &$context): void {
  */
 function _references_block_titles_updates_batch_temp_storage(&$context) {
   // Make sure to load temp storage, and loop over sections there.
-  $context['message'] = t('Processing temporary storage.');
+  $context['message'] = t('References: processing temporary storage.');
 
   // The DB connection.
   $database = \Drupal::database();
@@ -215,16 +215,16 @@ function _references_block_titles_updates_batch_temp_storage(&$context) {
  *   about nodes and revisions processed during the batch operation.
  */
 function _references_block_titles_updates_batch_end(&$context) {
-  $context['message'] = t('Successfully updated @nodes_updated/@nodes_processed nodes', [
+  $context['message'] = t('References: successfully updated @nodes_updated/@nodes_processed nodes', [
     '@nodes_updated' => $context['results']['nodes_updated'],
     '@nodes_processed' => $context['results']['nodes_processed'],
   ]);
-  $context['message'] = t('Successfully updated @revisions_updated/@revisions_processed revisions.', [
+  $context['message'] = t('References: successfully updated @revisions_updated/@revisions_processed revisions.', [
     '@revisions_updated' => $context['results']['revisions_updated'],
     '@revisions_processed' => $context['results']['revisions_processed'],
   ]);
 
-  $context['message'] = t('Successfully updated @temp_storage_updated temporary storage.', [
+  $context['message'] = t('References: successfully updated @temp_storage_updated temporary storage.', [
     '@temp_storage_updated' => $context['results']['temp_storage_updated'],
   ]);
 }