Add helpers to utilities bundle (#32324)

Adds currently missing utilities classes which are located in scss/helpers to
boostrap-utilities dist files.

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

scss/bootstrap-utilities.scss

@@ -6,13 +6,13 @@
  */
 
 // Configuration
-
 @import "functions";
 @import "variables";
 @import "mixins";
 @import "utilities";
 
+// Helpers
+@import "helpers";
 
 // Utilities
-
 @import "utilities/api";