chore: clear all cache

Author: karenc-bq

aws_advanced_python_wrapper/utils/rdsutils.py

@@ -264,3 +264,4 @@ def _get_dns_group(self, host: str):
     @staticmethod
     def clear_cache():
         RdsUtils.CACHE_PATTERNS.clear()
+        RdsUtils.CACHE_DNS_PATTERNS.clear()