DNS selection strategy enhancement

### 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

Using parallel DNS request strategies, it is occasionally observed that an upstream DNS server fails to resolve the correct result and returns 'NXDOMAIN'. However, possibly because this response arrives the fastest, it is selected.

### Proposed solution

I'm not sure whether the current version compares the results of DNS queries. It would be great if a simple filtering mechanism for the returned results could be added. Thank you!

### Alternatives considered and additional information

I’m currently using version v0.107.58