Support batch size > 1 when enable CP (#23269)

Co-authored-by: Shunkang <182541032+Shunkangz@users.noreply.github.co>
Co-authored-by: Khoa Pham <khoa.pham@radixark.ai>
Co-authored-by: Baizhou Zhang <sobereddiezhang@gmail.com>

python/sglang/srt/managers/schedule_policy.py

@@ -826,9 +826,7 @@ class PrefillAdder:
         # TODO support cp with multiple requests
         # Enabling context parallelism currently presents precision issues;
         # therefore, the prefill-batch setting is temporarily set to 1.
-        if (
-            self.dsa_prefill_cp_in_seq_split or self.prefill_context_parallel_enabled
-        ) and len(self.can_run_list) >= 1:
+        if (self.dsa_prefill_cp_in_seq_split) and len(self.can_run_list) >= 1:
             return AddReqResult.OTHER
 
         if (x := self.prefill_max_requests) is not None and len(self.can_run_list) >= x: