allow set blackip in fastest ip address mode

### 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

If an upstream server is polluted, an IP similar to 127.0.0.1 is returned. 127.0.0.1 may be the fastest in the speed test, but it is not accessible. Therefore, you want to provide an IP blacklist so that AdGuard does not return the IP addresses in the blacklist as the resolution result

### Proposed solution

Allows set an IP blacklist. In the fastest IP address mode, blacklisted IP addresses are excluded from the selection range. For example, if the upstream server returns 1.1.1.1, 2.2.2.2, and 127.0.0.1, but 127.0.0.1 is in the IP blacklist, the result 127.0.0.1 is excluded, and only the fastest IP address is selected in 1.1.1.1 and 2.2.2.2

PS: sorry for my bad English

### Alternatives considered and additional information

_No response_