[CI]Add EPLB CI. (#3568)

### What this PR does / why we need it?
1.Add eplb ci to check the change of eplb feature.
2.Add param checking of eplb params. 
### Does this PR introduce _any_ user-facing change?

### How was this patch tested?
Qwen in A3.


- vLLM version: v0.11.0rc3
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0

---------

Signed-off-by: offline0806 <3337230449@qq.com>
Co-authored-by: offline0806 <3337230449@qq.com>

vllm_ascend/eplb/eplb_updator.py

@@ -21,6 +21,7 @@ import torch.distributed as dist
 import vllm.envs as envs
 from vllm.logger import logger
 
+from vllm_ascend.eplb.core.eplb_utils import EPLBParamUtils
 from vllm_ascend.eplb.core.eplb_worker import EplbProcess
 
 
@@ -44,6 +45,7 @@ class EplbUpdator:
         self.num_expert_load_gather = 10
         self.periodic_load_gather = True
         self.num_iterations_eplb_update: torch.int64 = self.ascend_config.num_iterations_eplb_update
+        EPLBParamUtils.check_iterations(self.num_iterations_eplb_update)
         self.expert_map_path = expert_map_path
         self.expert_map_record_path = self.ascend_config.expert_map_record_path
 
@@ -64,6 +66,7 @@ class EplbUpdator:
         self.cur_iterations: torch.int64 = 0
 
         self.num_wait_worker_iterations: torch.int64 = self.ascend_config.num_wait_worker_iterations
+        EPLBParamUtils.check_iterations(self.num_wait_worker_iterations)
 
         self.process = process