feat: support EPD disaggregation (#12263)

Co-authored-by: liusy58 <liusy58@linux.alibaba.com>
Co-authored-by: ZhengWG <zwg0606@gmail.com>
Co-authored-by: Nicholas <45984215+liusy58@users.noreply.github.com>
Co-authored-by: Shangming Cai <csmthu@gmail.com>
Co-authored-by: Yuhao Yang <47235274+yhyang201@users.noreply.github.com>

test/srt/run_suite.py

@@ -152,6 +152,7 @@ suites = {
         TestFile("test_multi_instance_release_memory_occupation.py", 64),
         TestFile("test_pp_single_node.py", 800),
         TestFile("test_piecewise_cuda_graph.py", 1200),
+        TestFile("test_epd_disaggregation.py", 600),
     ],
     "per-commit-8-gpu-h200": [
         TestFile("test_deepseek_v3_basic.py", 275),