Support for DNS-over-DTLS

### Prerequisites

- [X] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer

- [X] I have searched other issues and found no duplicates

- [X] I want to request a feature or enhancement and not ask a question

### Description

Request supports DNS-over-DTLS, Similar to DoT, uses a DTLS (UDP) connection as transport as per [RFC9894](https://tools.ietf.org/html/rfc8094)