roachtest: stage_failure failed

roachtest.stage_failure [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAwsBazel/21334243?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAwsBazel/21334243?buildTab=artifacts#/http-register-routes/mixed-version) on release-25.4.10-rc @ [a1989021dd825212349c067edcd07a77597c0781](https://github.com/cockroachdb/cockroach/commits/a1989021dd825212349c067edcd07a77597c0781):

```
test http-register-routes/mixed-version failed: (mixedversion.go:891).Run: mixed-version test failure while running step 17 (restart node 1 with binary version v25.1.10): cluster.Stage: output:
curl: (22) The requested URL returned error: 503
gzip: stdin: unexpected end of file
tar: Child returned status 1
tar: Error is not recoverable: exiting now: TRANSIENT_ERROR(stage_failure): COMMAND_PROBLEM: exit status 2
test artifacts and logs in: /artifacts/http-register-routes/mixed-version/cpu_arch=arm64/run_1
```

Parameters:
- arch=arm64
- cloud=aws
- coverageBuild=false
- cpu=4
- encrypted=false
- mvtDeploymentMode=system-only
- mvtVersions=v24.2.10 → v24.3.30 → v25.1.10 → v25.2.16 → release-25.4.10-rc
- runtimeAssertionsBuild=false
- 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)

_Grafana is not yet available for aws clusters_

Same failure on other branches

- #161334 roachtest: stage_failure failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.4.3-rc]
- #154115 roachtest: stage_failure failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.4]
- #151910 roachtest: stage_failure failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3]
- #146357 roachtest: stage_failure failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.3]
- #146037 roachtest: stage_failure failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.2.0-rc]
- #140132 roachtest: stage_failure failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.1]
- #123276 roachtest: stage_failure failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-23.2]
- #123193 roachtest: stage_failure failed [O-roachtest O-robot T-testeng X-infra-flake branch-master]
- #123047 roachtest: stage_failure failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.1]

/cc @cockroachdb/test-eng

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Jira issue: CRDB-63507