[CI] Use nginx for package cache to speed up CI (#6170)

### What this PR does / why we need it?
 Use nginx for package cache to speed up CI

- vLLM version: v0.14.0
- vLLM main:
d68209402d

---------

Signed-off-by: wangli <wangli858794774@gmail.com>

.github/workflows/_e2e_test.yaml

@@ -144,11 +144,9 @@ jobs:
 
       - name: Config mirrors
         run: |
-          # Fix me: use nginx cache rather than the pypi
-          # sed -Ei 's@(ports|archive).ubuntu.com@cache-service.nginx-pypi-cache.svc.cluster.local:8081@g' /etc/apt/sources.list
-          # pip config set global.index-url http://cache-service.nginx-pypi-cache.svc.cluster.local/pypi/simple
-          # pip config set global.trusted-host cache-service.nginx-pypi-cache.svc.cluster.local
-          pip config set global.index-url https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple
+          sed -Ei 's@(ports|archive).ubuntu.com@cache-service.nginx-pypi-cache.svc.cluster.local:8081@g' /etc/apt/sources.list
+          pip config set global.index-url http://cache-service.nginx-pypi-cache.svc.cluster.local/pypi/simple
+          pip config set global.trusted-host cache-service.nginx-pypi-cache.svc.cluster.local
           apt-get update -y
           apt install git -y
 
@@ -254,8 +252,9 @@ jobs:
 
       - name: Config mirrors
         run: |
-          sed -i 's|ports.ubuntu.com|mirrors.tuna.tsinghua.edu.cn|g' /etc/apt/sources.list
-          pip config set global.index-url https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple
+          sed -Ei 's@(ports|archive).ubuntu.com@cache-service.nginx-pypi-cache.svc.cluster.local:8081@g' /etc/apt/sources.list
+          pip config set global.index-url http://cache-service.nginx-pypi-cache.svc.cluster.local/pypi/simple
+          pip config set global.trusted-host cache-service.nginx-pypi-cache.svc.cluster.local
           apt-get update -y
           apt install git wget curl -y
           git config --global url."https://gh-proxy.test.osinfra.cn/https://github.com/".insteadOf https://github.com/

.github/workflows/pr_test_light.yaml

@@ -61,6 +61,7 @@ jobs:
           filters: |
             e2e_tracker:
               - '.github/workflows/pr_test_light.yaml'
+              - '.github/workflows/_e2e_test.yaml'
               - 'vllm_ascend/**'
               - 'csrc/**'
               - 'cmake/**'