Anonymize hostnames in statistics and query log

### 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

Many people in my house can see the statistics.

Therefore I want the option (like PiHole already has) to anomize the DNS.

Nobody needs to know what other clients look at.