https admin interface setting independent of enabling DoH

### 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

Please provide a separate setting to enable https for the admin interface that is independent of enabling DoH too. While I want to access the web admin interface in a secure way, I do not want to give clients DoH access too.

### Proposed solution

Simple config option that disables these endpoints:

https://github.com/AdguardTeam/AdGuardHome/blob/6633ad63049468ad35283ee914651587cf39ef2d/internal/dnsforward/http.go#L742

### Alternatives considered and additional information

_No response_