[TEST]Add 2P1D multi node cases for nightly test (#3764)

### What this PR does / why we need it?
This PR adds the 2P1D multi node func/acc/perf test cases, we need test
them daily
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
by running the test

- vLLM version: v0.11.0rc3
- vLLM main:
c9461e05a4

---------

Signed-off-by: jiangyunfan1 <jiangyunfan1@h-partners.com>
Signed-off-by: wangli <wangli858794774@gmail.com>
Co-authored-by: wangli <wangli858794774@gmail.com>

tests/e2e/nightly/multi_node/scripts/run.sh

@@ -120,6 +120,17 @@ download_go() {
     print_success "Go $GOVER installed successfully"
 }
 
+install_ais_bench() {
+    local AIS_BENCH="$SRC_DIR/benchmark"
+    git clone https://gitee.com/aisbench/benchmark.git $AIS_BENCH
+    cd $AIS_BENCH
+    git checkout v3.0-20250930-master
+    pip3 install -e ./
+    pip3 install -r requirements/api.txt
+    pip3 install -r requirements/extra.txt
+    cd -
+}
+
 install_go() {
     # Check if Go is already installed
     if command -v go &> /dev/null; then
@@ -167,6 +178,7 @@ main() {
     checkout_src
     install_sys_dependencies
     install_vllm
+    install_ais_bench
     # to speed up mooncake build process, install Go here
     install_go
     cd "$WORKSPACE/source_code"