[client] Explicitly disable DNSOverTLS for systemd-resolved

[kleschenko]

Describe your changes

This change explicitly disables DNSOverTLS for the Netbird wg interface on systems using systemd-resolved. Currently, if the system has DNS over TLS enabled globally then netbird interface will inherit it and DNS resolution ends up in a broken state. Disabling dnsovertls setting explicitly for interface fixes this issue.

Issue ticket number and link

Updates #1483

Stack

Checklist

• Is it a bug fix
• Is a typo/documentation fix
• Is a feature enhancement
• It is a refactor
• Created tests that fail without the change (if possible)

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Documentation

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• I added/updated documentation for this change
• Documentation is not needed for this change (explain why)

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Paste the PR link from https://github.com/netbirdio/docs here:

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[kleschenko]

@mlsmaycon can someone please take a look at this change to see if it needs some additional work? We've noticed this problem with DNS on machines with DNSOverTLS enabled globally, and while there are proposed workarounds, it would be nice to get it fixed in the client

[lixmal]

Thanks @kleschenko