security/oidcauth: TestOIDCEnabled failed

security/oidcauth.TestOIDCEnabled [failed](https://mesolite.cluster.engflow.com/invocations/default/2ae95962-ebbc-441f-a517-0d12760b3cbd?testReportRun=1&testReportShard=1&testReportAttempt=1#targets-Ly9wa2cvc2VjdXJpdHkvb2lkY2F1dGg6b2lkY2F1dGhfdGVzdA==) on master @ [61e8d82a116c6abe7d91e47e27b8cd874c60184f](https://github.com/cockroachdb/cockroach/commits/61e8d82a116c6abe7d91e47e27b8cd874c60184f):

```
=== RUN TestOIDCEnabled
test_log_scope.go:172: test logs captured to: outputs.zip/logTestOIDCEnabled1590323209
test_log_scope.go:82: use -show-logs to present logs inline
test_server_shim.go:168: automatically injected an external process virtual cluster under test; see comment at top of test_server_shim.go for details.
authentication_oidc_test.go:304: expected 307 status code but got: 403
panic.go:694: -- test log scope end --
test logs left over in: outputs.zip/logTestOIDCEnabled1590323209
--- FAIL: TestOIDCEnabled (87.65s)
```

Parameters:
- attempt=1
- race=true
- run=1
- shard=1
Help

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

/cc @cockroachlabs/product-security

[Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-67438