upstream ipv6/ipv4 domain name

### 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

### The problem

some servers operate in dot and doh mode only when specifying a domain name. for example ordns.he.net
this domain name contains both ipv6 and ipv4. There is a need specify the priority manually.

### Proposed solution

I suggest introducing new addresses
tls6:// tls4:// https6:// https4:// quic6:// quic4:// etc.
or #ipv6 #ipv4 at end of line
or ipv6: ipv4: in start of line, example ipv6:tls://ordns.he.net

to force connection type to dns server

### Alternatives considered and additional information

bootstrap_prefer_ipv6 - unfortunately, it works for all specified servers at once.