增加算子测试框架分组计划

[ghangz]

这次改动补上了算子测试框架分组计划，主要是为了解决算子测试与维护流程里相关信息不够集中、人工整理成本较高的问题，让日常排查、验证和结果归档更直接。

实现上补充了对应工具或脚本逻辑，补上了对应测试，同时尽量保持现有用法不变，避免影响已有流程。

这一分支已经在沐曦算力环境完成实际验证，相关检查均已通过，现提交合入。

[gemini-code-assist]

Code Review

This pull request introduces a tool, tools/pytest_group_plan.py, to group pytest commands by subdirectories under the tests directory, along with its corresponding unit tests in tests/test_pytest_group_plan.py. The reviewer provided valuable feedback pointing out two potential FileNotFoundError exceptions: one if the tests directory does not exist when scanning for test files, and another if the parent directories for the specified --output path do not exist. Both comments include actionable code suggestions to improve the robustness of the script.

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[gemini-code-assist]

如果 root / "tests" 目录不存在，在对 (root / "tests").rglob("test_*.py") 进行迭代（如 sorted）时会抛出 FileNotFoundError 异常。建议在扫描前先检查该目录是否存在且为目录，以提高代码的健壮性。此外，将 root / "tests" 提取为局部变量 tests_dir 也可以减少重复代码，提升可读性。

    tests_dir = root / "tests"
    if tests_dir.is_dir():
        for path in sorted(tests_dir.rglob("test_*.py")):
            rel = path.relative_to(root).as_posix()
            parts = path.relative_to(tests_dir).parts
            group = parts[0] if len(parts) > 1 else "root"
            groups[group].append(rel)

[gemini-code-assist]

如果指定的 --output 路径包含不存在的父级目录（例如 --output build/report.json），直接调用 write_text 会抛出 FileNotFoundError。建议在写入前先创建父级目录。

Suggested change

	if args.output:
	args.output.write_text(text + "\n", encoding="utf-8")
	if args.output:
	args.output.parent.mkdir(parents=True, exist_ok=True)
	args.output.write_text(text + "\n", encoding="utf-8")