web interface polls health endpoint in a loop even before successful auth

**Describe the problem**

After fresh install the web interface polls health endpoint in a loop even before auth, every 2 seconds.

**To Reproduce**

1. Set up CockroachDB cluster or a single-node
2. Open the web interface (default port 8080)
4. See the behaviour play out

**Expected behaviour**

Polling for the endpoint every 2 seconds might cause unnecessary filling of logs, for instance in an environment where the nodes are behind a balancer etc.

The endpoint should be polled only after successful login into the interface.

**Environment:**
- CockroachDB v23.2.4
- Linux/Ubuntu

**Additional context**
No

Jira issue: CRDB-38078