Describe the problem

When running the test with a shared process virtual cluster:

        expected:
        ERROR: JWT authentication: not enabled (SQLSTATE 28000)
        
        found:
        ERROR: password authentication failed for user jwt_user (SQLSTATE 28P01)
            --- FAIL: TestAuthenticationAndHBARules/insecure=false/jwt/enable_jwt_auth (0.01s)

How to reproduce

Set the following in TestServerArgs to force a shared process tenant and cause the failure to happen.

DefaultTestTenant: base.SharedTestTenantAlwaysEnabled,

Expected behavior
The test should pass when running with a shared process virtual cluster, unless after investigation the test is expected not to work with one.

Ref: #112857
Epic CRDB-38970

Jira issue: CRDB-32687