[client] Set up networkd to ignore ip rules

[lixmal]

Describe your changes

If networkd is in use, a restart would wipe all NetBird ip rules. This config prevents that.

Issue ticket number and link

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

Select exactly one:

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

Docs PR URL (required if "docs added" is checked)

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

https://github.com/netbirdio/docs/pull/__

[nazarewk]

related materials:

• NetBird routes and/or policies disappear (are removed by systemd-networkd) #4578
• network: add ManageForeignRoutingPolicyRules= boolean setting systemd/systemd#19287

[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

See analysis details on SonarQube Cloud