NEW PROVIDER: Netbird DNS Zone

[yzqzss]

https://docs.netbird.io/manage/dns/custom-zones
https://docs.netbird.io/api/resources/dns-zones

---

Integration Test Result:

Netbird does not currently support MX and TXT records, so three tests that rely on TXT/MX failed. Otherwise, all good.

$ go test -profile NETBIRD
Testing Profile="NETBIRD" (TYPE="NETBIRD")
--- FAIL: TestDNSProviders (29.07s)
    --- FAIL: TestDNSProviders/test.internal (28.98s)
        --- FAIL: TestDNSProviders/test.internal/85:IGNORE_main:ignore_label (0.08s)
            helpers_integration_test.go:225: Expected 0 corrections on FIRST run, but found 2.
            helpers_integration_test.go:227: UNEXPECTED #0: + CREATE bar.test.internal A 5.5.5.5 ttl=300
            helpers_integration_test.go:227: UNEXPECTED #1: + CREATE mail.test.internal CNAME ghs.googlehosted.com. ttl=300
        --- FAIL: TestDNSProviders/test.internal/86:IGNORE_apex:apex_label (0.10s)
            helpers_integration_test.go:225: Expected 0 corrections on FIRST run, but found 2.
            helpers_integration_test.go:227: UNEXPECTED #0: + CREATE bar.test.internal A 5.5.5.5 ttl=300
            helpers_integration_test.go:227: UNEXPECTED #1: + CREATE mail.test.internal CNAME ghs.googlehosted.com. ttl=300
        --- FAIL: TestDNSProviders/test.internal/88:IGNORE_wilds:ignore_label=foo.* (0.09s)
            helpers_integration_test.go:225: Expected 0 corrections on FIRST run, but found 2.
            helpers_integration_test.go:227: UNEXPECTED #0: + CREATE bar.bat.test.internal A 5.5.5.5 ttl=300
            helpers_integration_test.go:227: UNEXPECTED #1: + CREATE mail.bat.test.internal CNAME ghs.googlehosted.com. ttl=300
Testing Profile="NETBIRD" (TYPE="NETBIRD")
Testing Profile="NETBIRD" (TYPE="NETBIRD")
Testing Profile="NETBIRD" (TYPE="NETBIRD")
FAIL
exit status 1
FAIL    github.com/StackExchange/dnscontrol/v4/integrationTest  29.161s