Dashboards: 11.6 legend labels limited to last word

### What happened? 11.5.10 works fine, but 11.6 and 12 cut off all but the last word of an alias, e.g. `alias(#A, 'multi-word label')` only displays `label`. ### What did you expect to happen? Show `multi-word label` like Grafana 11.5. ### Did this work before? Yes, in Grafana 11.5.2, 11.5.3, and 11.5.10. ### How do we reproduce it? 1. Make a graph panel showing a legend for `alias(#A, 'multi-word label')` 2. See full alias in 11.5. 3. See only `label` in 11.6 and 12. ### Is the bug inside a dashboard panel? | Key | Value | |--|--| | Panel | timeseries @ 11.6.0 | | Grafana | Grafana v11.6.0 (d2fdff9ee4) // Open Source | <details><summary>Panel debug snapshot dashboard</summary> ```json { "panels": [ { "id": 2, "type": "timeseries", "title": "Reproduced with embedded data", "description": "", "gridPos": { "h": 13, "w": 15, "x": 0, "y": 0 }, "fieldConfig": { "defaults": { "custom": { "drawStyle": "line", "lineInterpolation": "linear", "barAlignment": 0, "barWidthFactor": 0.6, "lineWidth": 1, "fillOpacity": 10, "gradientMode": "none", "spanNulls": false, "insertNulls": false, "showPoints": "never", "pointSize": 5, "stacking": { "mode": "none", "group": "A" }, "axisPlacement": "auto", "axisLabel": "Messages/s", "axisColorMode": "text", "axisBorderShow": false, "scaleDistribution": { "type": "linear" }, "axisCenteredZero": false, "hideFrom": { "tooltip": false, "viz": false, "legend": false }, "thresholdsStyle": { "mode": "off" } }, "color": { "mode": "fixed" …