Client settings - Identifier with IPv6(fe80::) can`t use the upstream dns settings.

### Prerequisites

- [x] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a) and found no answer

- [X] I have searched other issues and found no duplicates

- [X] I want to report a bug and not [ask a question or ask for help](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a)

- [X] I have set up AdGuard Home correctly and [configured clients to use it](https://github.com/AdguardTeam/AdGuardHome/wiki/Clients). (Use the [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a) for help with installing and configuring clients.)

### Platform (OS and CPU architecture)

Synology DSM 7.2, AMD64 (aka x86_64)

### Installation

Docker

### Setup

On one machine

### AdGuard Home version

v0.108.0-b.54

### Action

Client settings - Identifier settings:
ipv4 can use the upstream dns, but ipv6 use the global settings upstream dns.

### Expected result

ipv6 can use the Client settings upstream dns

### Actual result

ths is the result

### Additional information and/or screenshots

_No response_