ccl/sqlproxyccl: TestFailedConnection failed

ccl/sqlproxyccl.TestFailedConnection [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Ci_TestsAwsLinuxArm64_UnitTests/21294781?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Ci_TestsAwsLinuxArm64_UnitTests/21294781?buildTab=artifacts#/) on release-26.1 @ [1b15dfff1274b7bb24d5be06462805c54b6ee6f3](https://github.com/cockroachdb/cockroach/commits/1b15dfff1274b7bb24d5be06462805c54b6ee6f3):

```
=== RUN TestFailedConnection
test_log_scope.go:171: test logs captured to: /artifacts/tmp/_tmp/591e497c85919969802065d6359503c1/logTestFailedConnection3337280199
test_log_scope.go:82: use -show-logs to present logs inline
proxy_handler_test.go:2958:
Error Trace: pkg/ccl/sqlproxyccl/proxy_handler_test.go:2992
Error: Expect "failed to connect to ``user=unused database=``: localhost:38563 (localhost): failed to receive message: unexpected EOF" to match "server requires encryption"
Test: TestFailedConnection
panic.go:615: -- test log scope end --
test logs left over in: /artifacts/tmp/_tmp/591e497c85919969802065d6359503c1/logTestFailedConnection3337280199
--- FAIL: TestFailedConnection (1.08s)
```
Help

See also: [How To Investigate a Go Test Failure \(internal\)](https://cockroachlabs.atlassian.net/l/c/HgfXfJgM)

Same failure on other branches

- #135820 ccl/sqlproxyccl: TestFailedConnection failed [C-test-failure O-robot T-cloud-platform branch-master]

/cc @cockroachdb/sqlproxy-prs

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Jira issue: CRDB-62411