Fix imported variations count on batched import. (#41187)

Co-authored-by: Juan de Paco <juan.d@onthegosystems.com>

plugins/woocommerce/changelog/41187-fix-41186

@@ -0,0 +1,4 @@
+Significance: minor
+Type: fix
+
+Import variations count fails when importing more than 30 products

plugins/woocommerce/includes/admin/class-wc-admin-importers.php

@@ -306,6 +306,7 @@ class WC_Admin_Importers {
 					'position'            => $importer->get_file_position(),
 					'percentage'          => $percent_complete,
 					'imported'            => count( $results['imported'] ),
+					'imported_variations' => count( $results['imported_variations'] ),
 					'failed'              => count( $results['failed'] ),
 					'updated'             => count( $results['updated'] ),
 					'skipped'             => count( $results['skipped'] ),