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

@@ -339,7 +339,7 @@ function _publications_search_block_rename_batch_start($node_count, $revision_co
  * @param array|\DrushBatchContext $context
  *   The batch context array, which is updated with counts.
  */
-function _publications_search_block_rename_batch_node_update($node_ids, &$context) {
+function _publications_search_block_rename_batch_node_update(array $node_ids, &$context) {
   $node_storage = \Drupal::entityTypeManager()->getStorage('node');
 
   $nodes = $node_storage->loadMultiple($node_ids);
@@ -380,7 +380,7 @@ function _publications_search_block_rename_batch_node_update($node_ids, &$contex
  * @param array|\DrushBatchContext $context
  *   The batch context array, which is updated with counts.
  */
-function _publications_search_block_rename_batch_revision_update($revision_ids, &$context) {
+function _publications_search_block_rename_batch_revision_update(array $revision_ids, &$context) {
   $node_storage = \Drupal::entityTypeManager()->getStorage('node');
 
   foreach ($revision_ids as $revision_id) {
@@ -424,7 +424,7 @@ function _publications_search_block_rename_batch_revision_update($revision_ids,
  * @param array|\DrushBatchContext $context
  *   The batch context array, which is updated with counts.
  */
-function _publications_search_block_rename_batch_temp_storage_update($keys, &$context) {
+function _publications_search_block_rename_batch_temp_storage_update(array $keys, &$context) {
   /** @var \Drupal\Core\KeyValueStore\KeyValueDatabaseExpirableFactory $key_value */
   $key_value = \Drupal::service('keyvalue.expirable.database');