basalt-26.3: roachtest: npgsql failed

roachtest.npgsql [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyGcePrivateBazel/21514453?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyGcePrivateBazel/21514453?buildTab=artifacts#/npgsql) on basalt-26.3 @ [4fda4910b2015319b2f775e42d2f2fb15130d19a](https://github.com/cockroachdb/cockroach/commits/4fda4910b2015319b2f775e42d2f2fb15130d19a):

Failed with:

```
(orm_helpers.go:232).summarizeFailed:
Tests run on Cockroach v26.3.2-dev-4fda4910b2015319b2f775e42d2f2fb15130d19a
Tests run against npgsql v7.0.2
3418 Total Tests Run
2673 tests passed
745 tests failed
150 tests skipped
21 tests ignored
0 tests passed unexpectedly
1 test failed unexpectedly
0 tests expected failed but skipped
0 tests expected failed but not run
---
--- FAIL: Npgsql.Tests.PoolTests.Timeout_getting_connector_from_exhausted_pool(False) - (unexpected)
For a full summary look at the npgsql artifacts
An updated blocklist (npgsqlBlocklist) is available in the artifacts' npgsql log
test artifacts and logs in: /artifacts/npgsql/run_1
```
Cluster Node to Ip Mapping:
| Node | Public IP | Private IP |
| --- | --- | --- |
| teamcity-21514453-1789279114-149-n1cpu4-0001 | | 10.91.96.15 |

Parameters:
- arch=amd64
- cloud=gce
- coverageBuild=false
- cpu=4
- diskCount=0
- encrypted=false
- fs=ext4
- localSSD=true
- metamorphicLeases=default
- metamorphicWriteBuffering=true
- 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)

See: [Grafana](https://go.crdb.dev/roachtest-grafana/teamcity-21514453/npgsql/1789305051153/1789305600496)

_Logs were not uploaded to Datadog_

Same failure on other branches

- #174723 release-26.3.2-rc: roachtest: npgsql failed [C-test-failure O-roachtest O-robot P-3 T-sql-foundations branch-release-26.3.2-rc]
- #174716 release-26.2.7-rc: roachtest: npgsql failed [C-test-failure O-roachtest O-robot P-2 T-sql-foundations branch-release-26.2.7-rc]

/cc @cockroachlabs/sql-foundations

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

Jira issue: CRDB-68365

Start with the Npgsql artifacts and log from /artifacts/npgsql/run_1, focusing on PoolTests.Timeout_getting_connector_from_exhausted_pool(False). Read pkg/cmd/roachtest/README.md for the roachtest workflow and inspect orm_helpers.go:232, where the failure summary is assembled. Done means the cause of the unexpected failure is addressed and the npgsql roachtest no longer reports it unexpectedly.

Written by the indexing model from the issue text.