[NVIDIA] Set EP_SIZE back to 1 for B200 dsr1 fp8 (#242)

* Set ep = 1 for b200

* Re-enable EP for fp4

Author: kaixih

.github/configs/nvidia-master.yaml

@@ -83,15 +83,15 @@ dsr1-fp8-b200-sglang:
   - isl: 1024
     osl: 1024
     search-space:
-    - { tp: 8, ep: 8, conc-start: 4, conc-end: 64 }
+    - { tp: 8, ep: 1, conc-start: 4, conc-end: 64 }
   - isl: 1024
     osl: 8192
     search-space:
-    - { tp: 8, ep: 8, conc-start: 4, conc-end: 64 }
+    - { tp: 8, ep: 1, conc-start: 4, conc-end: 64 }
   - isl: 8192
     osl: 1024
     search-space:
-    - { tp: 8, ep: 8, conc-start: 4, conc-end: 64 }
+    - { tp: 8, ep: 1, conc-start: 4, conc-end: 64 }
 
 dsr1-fp8-b200-trt:
   image: nvcr.io#nvidia/tensorrt-llm/release:1.1.0rc2.post2