roachtest: dns_problem failed

roachtest.dns_problem [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/15551380?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/15551380?buildTab=artifacts#/cdc/initial-scan-only) on release-24.1 @ [1586bcf5944d4f36f5f1587799c25dc7adc349ff](https://github.com/cockroachdb/cockroach/commits/1586bcf5944d4f36f5f1587799c25dc7adc349ff):

```
test cdc/initial-scan-only failed: (cluster.go:2284).Start: in provider: gce: TRANSIENT_ERROR(dns_problem): output: ERROR: (gcloud.dns.record-sets.create) HTTPError 409: The resource 'entity.rrset' named '_system-ui._tcp.teamcity-15551380-1717739310-46-n4cpu16.roachprod-managed.crdb.io. (SRV)' already exists: exit status 1
test artifacts and logs in: /artifacts/cdc/initial-scan-only/run_1
```

Parameters:
- ROACHTEST_arch=amd64
- ROACHTEST_cloud=gce
- ROACHTEST_coverageBuild=false
- ROACHTEST_cpu=16
- ROACHTEST_encrypted=false
- ROACHTEST_fs=ext4
- ROACHTEST_localSSD=true
- ROACHTEST_metamorphicBuild=false
- ROACHTEST_ssd=0
Help

See: [roachtest README](https://github.com/cockroachdb/cockroach/blob/master/pkg/cmd/roachtest/README.md)

See: [How To Investigate \(internal\)](https://cockroachlabs.atlassian.net/l/c/SSSBr8c7)

See: [Grafana](https://go.crdb.dev/roachtest-grafana/teamcity-15551380/cdc-initial-scan-only/1717754823193/1717754962478)

Same failure on other branches

- #123977 roachtest: dns_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-23.2.5-rc]
- #123655 roachtest: dns_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-23.1.21-rc]
- #123608 roachtest: dns_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.1.0-rc]
- #121094 roachtest: dns_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-23.2.4-rc]
- #121093 roachtest: dns_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-23.2.4-rc]
- #121092 roachtest: dns_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-23.1]
- #121090 roachtest: dns_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-23.2]
- #120959 roachtest: dns_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-master]

/cc @cockroachdb/test-eng

[This test on roachdash](https://roachdash.crdb.dev/?filter=status:open%20t:.*dns_problem.*&sort=title+created&display=lastcommented+project) | [Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-39372