Disable Woocommerce product tags display by alphabetical order

wc_get_product_tag_list uses get_the_terms function, so you can use get_the_terms filter to reorder your tags:

add_filter( 'get_the_terms', 'get_the_terms_filter', 10, 3 );
function get_the_terms_filter( $terms, $post_id, $taxonomy ){
  // filter...

  return $terms;
}