config UI: rename meter usage option from "Consumer / Charger" to "Charger" (#31145)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

i18n/de.json

@@ -551,7 +551,7 @@
       "usage": {
         "aux": "Intelligenter Verbraucher",
         "battery": "Batterie",
-        "charge": "Verbraucher / Ladegerät",
+        "charge": "Ladegerät",
         "grid": "Netzanschluss",
         "label": "Verwendung",
         "pv": "Erzeugung"

i18n/en.json

@@ -550,7 +550,7 @@
       "usage": {
         "aux": "Self-regulating consumer",
         "battery": "Battery",
-        "charge": "Consumer / Charger",
+        "charge": "Charger",
         "grid": "Grid",
         "label": "Usage",
         "pv": "Production"

i18n/lb.json

@@ -518,7 +518,7 @@
       "usage": {
         "aux": "Intelligente Verbraucher",
         "battery": "Batterie",
-        "charge": "Verbraucher / Luedgerät",
+        "charge": "Luedgerät",
         "grid": "Réseau",
         "label": "Benotzung",
         "pv": "Productioun"