Add two scripts

[DubhepPan]

Add two scripts for testing

[gemini-code-assist]

Summary of Changes

Hello @DubhepPan, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces two new shell scripts aimed at enhancing the automated testing capabilities for the deep-ep package. These scripts facilitate the systematic execution of test_intranode.py and test_low_latency.py by enumerating various input parameters. This approach ensures a more comprehensive validation of the system under different configurations, while also automating the necessary build, installation, and environment setup steps.

Highlights

• New Test Automation Scripts: Two new bash scripts, enumerate_test_intranode.sh and enumerate_test_low_latency.sh, have been added to automate the execution of specific Python test files.
• Comprehensive Parameter Enumeration: These scripts are designed to run test_intranode.py and test_low_latency.py respectively, iterating through a wide range of parameter combinations to ensure thorough testing coverage.
• Automated Build and Environment Setup: Each script includes functionality to conditionally build and install the deep-ep package, set the HCCL_BUFFSIZE environment variable, and source the Ascend toolkit environment, streamlining the testing workflow.

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[gemini-code-assist]

Code Review

This pull request adds two test enumeration scripts. I've found a few issues, including a critical bug in enumerate_test_low_latency.sh where some test parameter loops are empty because the corresponding arrays are not defined, causing tests to be skipped silently. Both scripts also have issues with argument parsing, where they reference unhandled options and a non-existent show_help function. I've also included some suggestions for improving code consistency and safety.