Fix make triton command on release branch

[atalman]

Fixes #120044

Should fix build from source instructions on release branch here: https://github.com/pytorch/pytorch#from-source

Please note we are using /test/ channel for release here to make sure it works, before actual release is completed.

Test main:

make triton
pip3 uninstall -y triton
WARNING: Skipping triton as it is not installed.
Looking in indexes: https://download.pytorch.org/whl/nightly/
Collecting pytorch-triton==3.0.0+a9bc1a3647
  Downloading https://download.pytorch.org/whl/nightly/pytorch_triton-3.0.0%2Ba9bc1a3647-cp310-cp310-linux_x86_64.whl (239.0 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 239.0/239.0 MB 8.7 MB/s eta 0:00:00
Requirement already satisfied: filelock in /home/atalman/miniconda3/envs/py310/lib/python3.10/site-packages (from pytorch-triton==3.0.0+a9bc1a3647) (3.13.1)
Installing collected packages: pytorch-triton
  Attempting uninstall: pytorch-triton
    Found existing installation: pytorch-triton 2.2.0
    Uninstalling pytorch-triton-2.2.0:
      Successfully uninstalled pytorch-triton-2.2.0
Successfully installed pytorch-triton-3.0.0+a9bc1a3647

Test release/2.2:

make triton
pip3 uninstall -y triton
WARNING: Skipping triton as it is not installed.
Looking in indexes: https://download.pytorch.org/whl/test/
Collecting pytorch-triton==2.2.0
  Using cached https://download.pytorch.org/whl/test/pytorch_triton-2.2.0-cp310-cp310-linux_x86_64.whl (183.1 MB)
Requirement already satisfied: filelock in /home/atalman/miniconda3/envs/py310/lib/python3.10/site-packages (from pytorch-triton==2.2.0) (3.13.1)
Installing collected packages: pytorch-triton
  Attempting uninstall: pytorch-triton
    Found existing installation: pytorch-triton 3.0.0+a9bc1a3647
    Uninstalling pytorch-triton-3.0.0+a9bc1a3647:
      Successfully uninstalled pytorch-triton-3.0.0+a9bc1a3647
Successfully installed pytorch-triton-2.2.0

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/121169

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✅ You can merge normally! (1 Unrelated Failure)

As of commit 9bb6ce0 with merge base eba28a6 ():

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / linux-focal-cuda12.1-py3.10-gcc9-sm86 / test (default, 4, 5, linux.g5.4xlarge.nvidia.gpu) (gh)
  inductor/test_triton_kernels.py::KernelTests::test_triton_kernel_equal_to_1_arg_dynamic_False

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[atalman]

@pytorchbot merge -f "signal is green"

[pytorchmergebot]

Merge started

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