add wp_suspend_cache_addition() to bulk operation calls

Add a call to https://developer.wordpress.org/reference/functions/wp_suspend_cache_addition/ as part of the start bulk operations to disable adding items to the object cache.
It then re-enables adding items to the object cache in end_bulk_operation().

vip-helpers/vip-wp-cli.php

@@ -23,17 +23,23 @@ public static function vip_inmemory_cleanup() {
 
 	/**
 	 * Disable term counting so that terms are not all recounted after every term operation
+  	 * Disable adding data to the object cache
 	 */
 	public static function start_bulk_operation() {
 		// Disable term count updates for speed
 		wp_defer_term_counting( true );
+		//disable adding data to object cache (in-memory and memcache/redis)
+		wp_suspend_cache_addition( true );
 	}
 
 	/**
 	 * Re-enable Term counting and trigger a term counting operation to update all term counts
+  	 * Re-enable adding data to the object cache
 	 */
 	public static function end_bulk_operation() {
 		// This will also trigger a term count.
 		wp_defer_term_counting( false );
+		//re-enable adding data to object cache (in-memory and memcache/redis)
+		wp_suspend_cache_addition( false );
 	}
 }