roachtest: cluster_creation failed

roachtest.cluster_creation [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/21327568?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/21327568?buildTab=artifacts#/unoptimized-query-oracle/disable-rules=all/seed-multi-region) on master @ [eb8f019262c438d83266cf3e1d668a00ff6399d8](https://github.com/cockroachdb/cockroach/commits/eb8f019262c438d83266cf3e1d668a00ff6399d8):

```
test unoptimized-query-oracle/disable-rules=all/seed-multi-region failed: (test_runner.go:1016).func4: in provider: gce: Command: gcloud [compute instances create --subnet default --format json --labels usage=roachtest,roachtest-branch=master,roachprod=true,cluster=teamcity-21327568-1777271280-226-n9cpu4-geo,lifetime=12h0m0s,arch=amd64,created=2026-04-27t17_50_03z --scopes cloud-platform --image ubuntu-2204-jammy-v20260414 --image-project ubuntu-os-cloud --boot-disk-type --service-account 21965078311-compute@developer.gserviceaccount.com --maintenance-policy MIGRATE --local-ssd interface=NVME --machine-type n2-standard-4 --min-cpu-platform Intel Ice Lake --metadata-from-file startup-script=/tmp/gce-startup-script1817505331 --project cockroach-ephemeral --boot-disk-size=32GB --zone us-west1-c teamcity-21327568-1777271280-226-n9cpu4-geo-0005]: failed to run: gcloud compute instances create --subnet default --format json --labels usage=roachtest,roachtest-branch=master,roachprod=true,cluster=teamcity-21327568-1777271280-226-n9cpu4-geo,lifetime=12h0m0s,arch=amd64,created=2026-04-27t17_50_03z --scopes cloud-platform --image ubuntu-2204-jammy-v20260414 --image-project ubuntu-os-cloud --boot-disk-type --service-account 21965078311-compute@developer.gserviceaccount.com --maintenance-policy MIGRATE --local-ssd interface=NVME --machine-type n2-standard-4 --min-cpu-platform Intel Ice Lake --metadata-from-file startup-script=/tmp/gce-startup-script1817505331 --project cockroach-ephemeral --boot-disk-size=32GB --zone us-west1-c teamcity-21327568-1777271280-226-n9cpu4-geo-0005
stdout:
stderr: WARNING: You have selected a disk size of under [200GB]. This may result in poor I/O performance. For more information, see: https://developers.google.com/compute/docs/disks#performance.
ERROR: (gcloud.compute.instances.create) Could not fetch resource:
---
code: ZONE_RESOURCE_POOL_EXHAUSTED_WITH_DETAILS
errorDetails:
- help:
links:
- description: Troubleshooting documentation
url: https://cloud.google.com/compute/docs/resource-error
- localizedMessage:
locale: en-US
message: A n2-standard-4 VM instance with 1 local SSD(s) is currently unavailable
in the us-west1-c zone. Try requesting the VM in another zone. For more information,
view the troubleshooting documentation.
- errorInfo:
domain: compute.googleapis.com
metadatas:
attachment: local-ssd:1
vmType: n2-standard-4
zone: us-west1-c
zonesAvailable: ''
reason: stockout
message: The zone 'projects/cockroach-ephemeral/zones/us-west1-c' does not have enough
resources available to fulfill the request. '(resource type:compute)'.: exit status 1 [owner=test-eng]
```

Parameters:
- cloud=gce
- coverageBuild=false
- cpu=4
- diskCount=0
- runtimeAssertionsBuild=false
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)

/cc @cockroachdb/test-eng

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Jira issue: CRDB-63294