Mount EFS with custom DHCP options VPC not supported

**Environment:**
v2.4.1

**Bug description and how to reproduce:**
When a VPC has a custom DHCP option configured and is disconnected from AWS DNS, it is unable to resolve the DNS name of EFS - fs-111111.efs.us-west-2.amazonaws.com as it is a private hosted zone within AWS. Ideally in such scenarios, EFS needs to be mounted via IP address. There is no way we can mount using IP address at present it seems

**Additional context:**
Large scale Organizations prefer to route there organization DNS queries through custom DNS servers. In such a scenario, they would not connect to AWS DNS servers causing the name resolution to fail.