[None][infra] use public torch index as CI backup (NVIDIA#12261)

Signed-off-by: Tyler Burt <195370667+tburt-nv@users.noreply.github.com>

Author: tburt-nv

jenkins/L0_Test.groovy

@@ -3655,9 +3655,9 @@ def launchTestJobs(pipeline, testFilter)
                             // Use internal mirror instead of https://download.pytorch.org/whl/cu130 for better network stability.
                             // PyTorch CUDA 13.0 package and torchvision package can be installed as expected.
                             if (k8s_arch == "amd64") {
-                                trtllm_utils.llmExecStepWithRetry(pipeline, script: "pip3 install torch==2.9.1+cu130 torchvision==0.24.1+cu130 --extra-index-url https://urm.nvidia.com/artifactory/api/pypi/pytorch-cu128-remote/simple")
+                                trtllm_utils.llmExecStepWithRetry(pipeline, script: "pip3 install torch==2.9.1+cu130 torchvision==0.24.1+cu130 --extra-index-url https://urm.nvidia.com/artifactory/api/pypi/pytorch-cu128-remote/simple --extra-index-url https://download.pytorch.org/whl/cu130")
                             } else {
-                                trtllm_utils.llmExecStepWithRetry(pipeline, script: "pip3 install torch==2.9.1+cu130 torchvision==0.24.1 --extra-index-url https://urm.nvidia.com/artifactory/api/pypi/pytorch-cu128-remote/simple")
+                                trtllm_utils.llmExecStepWithRetry(pipeline, script: "pip3 install torch==2.9.1+cu130 torchvision==0.24.1 --extra-index-url https://urm.nvidia.com/artifactory/api/pypi/pytorch-cu128-remote/simple --extra-index-url https://download.pytorch.org/whl/cu130")
                             }
                         }