[CI] Add per-job uv venv isolation and upgrade CI version to Cuda 13 (#23119)

Co-authored-by: Kangyan Zhou <zky314343421@gmail.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: Alison Shao <a.shao@wustl.edu>
Co-authored-by: Mick <mickjagger19@icloud.com>

.github/workflows/pr-test-multimodal-gen.yml

@@ -117,7 +117,7 @@ jobs:
         with:
           path: sgl-kernel/dist/
           merge-multiple: true
-          pattern: wheel-python3.10-cuda12.9
+          pattern: wheel-python3.10-cuda13.0
 
       - name: Install dependencies
         timeout-minutes: 20
@@ -186,7 +186,7 @@ jobs:
         with:
           path: sgl-kernel/dist/
           merge-multiple: true
-          pattern: wheel-python3.10-cuda12.9
+          pattern: wheel-python3.10-cuda13.0
 
       - name: Install dependencies
         timeout-minutes: 20
@@ -251,7 +251,7 @@ jobs:
         with:
           path: sgl-kernel/dist/
           merge-multiple: true
-          pattern: wheel-python3.10-cuda12.9
+          pattern: wheel-python3.10-cuda13.0
 
       - name: Install dependencies
         timeout-minutes: 20
@@ -300,7 +300,7 @@ jobs:
         with:
           path: sgl-kernel/dist/
           merge-multiple: true
-          pattern: wheel-python3.10-cuda12.9
+          pattern: wheel-python3.10-cuda13.0
 
       - name: Install dependencies
         timeout-minutes: 20
@@ -356,7 +356,7 @@ jobs:
         with:
           path: sgl-kernel/dist/
           merge-multiple: true
-          pattern: wheel-python3.10-cuda12.9
+          pattern: wheel-python3.10-cuda13.0
 
       - name: Install dependencies
         timeout-minutes: 20