Dynatrace: Legacy Logs auth missing Auth Token

### What happened? Every request for Auth Logs seems to be failing with 401 OAuth token is missing. Reproduced [here](https://datasourcedev.grafana-dev.net/d/tif48j4/new-dashboard?folderUid=dexqmnud72b5sc&orgId=1&from=now-6h&to=now&timezone=browser&editPanel=1) <img width="1000" height="336" alt="Image" src="https://github.com/user-attachments/assets/78e72032-855b-4b00-8da7-e480271a8189" /> ### What did you expect to happen? That we can query Logs correctly ### Did this work before? not sure ### How do we reproduce it? 1. Configure Datasource 2. Try to Query Logs in Explore 3. Observe Failure ### Is the bug inside a dashboard panel? _No response_ ### Environment (with versions)? Grafana: OS: Browser: ### Grafana platform? None ### Datasource(s)? Dynatrace