[benchmark] Add triton version in the moe tuned config

[jeejeelee]

Purpose

See: #24112 (comment)
The tuned configuration will include the triton_version, like:

{   "triton_version": "3.4.0",
    "1": {
        "BLOCK_SIZE_M": 16,
        "BLOCK_SIZE_N": 32,
        "BLOCK_SIZE_K": 64,
        "GROUP_SIZE_M": 1,
        "num_warps": 4,
        "num_stages": 4
    },
    "2": {
        "BLOCK_SIZE_M": 16,
        "BLOCK_SIZE_N": 128,
        "BLOCK_SIZE_K": 64,
        "GROUP_SIZE_M": 1,
        "num_warps": 4,
        "num_stages": 3
    },
    "4": {
        "BLOCK_SIZE_M": 16,
        "BLOCK_SIZE_N": 128,
        "BLOCK_SIZE_K": 64,
        "GROUP_SIZE_M": 1,
        "num_warps": 4,
        "num_stages": 3
    },
}

Test Plan

Test Result

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[gemini-code-assist]

Code Review

This pull request adds the Triton version to the tuned MoE configuration files. The changes involve updating the benchmark script to save the version and modifying the MoE layer to handle this new metadata when loading configurations. The version of the Triton placeholder is also updated.

My review identifies a potential robustness issue in how the configuration is loaded. The current approach of explicitly removing the triton_version key is brittle. I've suggested a more resilient method that filters for numeric keys, which will prevent crashes if other metadata is added to the configuration files in the future.

[gemini-code-assist]

The proposed change to explicitly pop triton_version is brittle. If other metadata is added to the configuration file in the future, this code will fail with a ValueError when trying to convert a non-integer string key to an integer.

A more robust approach is to filter for keys that are valid integers. By checking key.isdigit(), you can automatically ignore any non-numeric keys, including triton_version and any future metadata, making the code more resilient to future changes.

Suggested change

	return {int(key): val for key, val in json.load(f).items()}
	return {int(key): val for key, val in json.load(f).items() if key.isdigit()}

[simon-mo]

There should also be similar tuning done for fp8 gemm? I'm not super sure though but I recall the config is different. cc @mgoin