add nominal phase 3 rel 8 bg

beambackgrounds.json

@@ -66479,6 +66479,24 @@
             "mc_production_MC15ri_a"
         ]
     },
+    "nominal-phase3-rel08": {
+        "type": "run-independent",
+        "kek_path": null,
+        "gridka_path": null,
+        "ceph_path": "/ceph/ihaide/BGOverlay/prerelease-08-00-00a/phase3/overlay_scenario2/BGx1/set0",
+        "luminostiy": null,
+        "n_events": null,
+        "experiment": 0,
+        "run": 0,
+        "bucket": null,
+        "date": null,
+        "beam_energy": null,
+        "qualitiy": true,
+        "gridka_server": "root://dcache-kit.gridka.de:1094",
+        "global_tags": [
+            "mc_production_MC15ri_a"
+        ]
+    },
     "early-phase3-rel08": {
         "type": "run-independent",
         "kek_path": "/group/belle2/dataprod/BGOverlay/early_phase3/release-08-00-03/overlay/BGx1/set0",