Deepep adapt custom cann installation path

[BourneSun0527]

No description provided.

[gemini-code-assist]

Summary of Changes

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This pull request enhances the build configuration by externalizing the Ascend CANN package path. Instead of a fixed directory, the build process will now dynamically resolve the path from an environment variable, making the project more adaptable to diverse development environments and custom Ascend toolkit installations.

Highlights

• Dynamic CANN Path Configuration: The hardcoded ASCEND_CANN_PACKAGE_PATH in both csrc/deepep/ops/CMakePresets.json and csrc/deepep/ops2/CMakePresets.json has been replaced with a reference to the $penv{ASCEND_HOME_PATH} environment variable. This change allows users to specify a custom Ascend CANN installation path, enhancing build system flexibility.

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[gemini-code-assist]

Code Review

This pull request adapts the build system to support custom CANN installation paths by using the ASCEND_HOME_PATH environment variable in the CMake presets. This is a good change for flexibility. My review comments highlight a potential issue with this approach: it makes the build process more fragile for users who might run CMake directly without the provided build.sh script, as the lack of a default path could lead to build failures if the environment variable isn't set. Overall, the change is in the right direction, but could be made more robust.