Connectivity: Silence " InsecureRequestWarning: Unverified HTTPS request is being made to host 'localhost'."

When connecting to a cluster eg. via port-forwarding where the SQL Alchemy URI is set like this: `export CRATEDB_SQLALCHEMY_URL=crate://crate@localhost:4200/?sslmode=require`, the output is full with:

```text
.venv/lib/python3.12/site-packages/urllib3/connectionpool.py:1097: InsecureRequestWarning: Unverified HTTPS request is being made to host 'localhost'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#tls-warnings
warnings.warn(
```

In case there is an easy way to silence this, or print it only once ... TY!