[sync] Sync feature/colossal-infer with main

.github/workflows/build_on_pr.yml

@@ -140,7 +140,7 @@ jobs:
 
       - name: Install Colossal-AI
         run: |
-          BUILD_EXT=1 pip install -v -e .
+          pip install -v -e .
           pip install -r requirements/requirements-test.txt
 
       - name: Store Colossal-AI Cache