ci : use t4-medium for cuda jobs (#29842)

[no ci]

.github/workflows/ci-self-hosted-cuda.yml

@@ -45,7 +45,7 @@ env:
 
 jobs:
   gpu-cuda:
-    runs-on: "hf-jobs-t4-small:cuda13"
+    runs-on: "hf-jobs-t4-medium:cuda13"
 
     steps:
       - name: Clone

.github/workflows/server-self-hosted.yml

@@ -102,7 +102,7 @@ jobs:
           PYTEST_WORKERS=1 ./tests.sh
 
   server-cuda:
-    runs-on: "hf-jobs-t4-small:cuda13"
+    runs-on: "hf-jobs-t4-medium:cuda13"
 
     steps:
       - name: Clone