roachtest: cluster_creation failed

roachtest.cluster_creation [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAwsBazel/21275110?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAwsBazel/21275110?buildTab=artifacts#/kv95/enc=false/nodes=3/cpu=96) on release-25.2 @ [9d5f3375e7bd64aaad14432ae10b6c91f637ae5a](https://github.com/cockroachdb/cockroach/commits/9d5f3375e7bd64aaad14432ae10b6c91f637ae5a):

```
test kv95/enc=false/nodes=3/cpu=96 failed: (test_runner.go:840).func4: in provider: aws: failed to run: aws ec2 run-instances --associate-public-ip-address --count 1 --instance-type c6a.24xlarge --image-id ami-0e83be366243f524a --key-name teamcity-runner-4IYD1HnNeRHjtlQXzlXvogrwCrA= --region us-east-2 --security-group-ids sg-04d72b57e29d671f1 --subnet-id subnet-0258dc9d1b6473d84 --tag-specifications ResourceType=instance,Tags=[{Key=usage,Value=roachtest},{Key=roachtest-branch,Value=release-25-2},{Key=Name,Value=teamcity-21275110-1773985277-67-n4cpu96-0002},{Key=Cluster,Value=teamcity-21275110-1773985277-67-n4cpu96},{Key=spot,Value=true},{Key=roachprod,Value=true},{Key=cluster,Value=teamcity-21275110-1773985277-67-n4cpu96},{Key=lifetime,Value=12h0m0s},{Key=arch,Value=amd64},{Key=created,Value=2026-03-20T07:14:24Z}] ResourceType=volume,Tags=[{Key=usage,Value=roachtest},{Key=roachtest-branch,Value=release-25-2},{Key=Name,Value=teamcity-21275110-1773985277-67-n4cpu96-0002},{Key=Cluster,Value=teamcity-21275110-1773985277-67-n4cpu96},{Key=spot,Value=true},{Key=roachprod,Value=true},{Key=cluster,Value=teamcity-21275110-1773985277-67-n4cpu96},{Key=lifetime,Value=12h0m0s},{Key=arch,Value=amd64},{Key=created,Value=2026-03-20T07:14:24Z}] --user-data file:///tmp/aws-startup-script3798081697 --iam-instance-profile Name=roachprod-testing --block-device-mapping file:///tmp/aws-block-device-mapping214237756 --instance-market-options MarketType=spot,SpotOptions={SpotInstanceType=one-time,InstanceInterruptionBehavior=terminate} --output json: stderr:
An error occurred (MaxIOPSLimitExceeded) when calling the RunInstances operation: You have exceeded your maximum io2 IOPS limit of 100000 IOPS in this region. Please contact AWS Support to request an Elastic Block Store service limit increase.: exit status 254 [owner=test-eng]
```

Parameters:
- MetamorphicFilesystem=xfs
- MetamorphicVolumeType=io2
- cloud=aws
- coverageBuild=false
- cpu=96
- 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-61816