Fixed missing env vars in some test workflow steps

[CatChen]

No description provided.

[CatChen]

• Fixed missing env vars in some test workflow steps #4878 👈
• main

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[what-the-diff]

PR Summary

• Changed Environment Variable in Workflow Step
  The environment variable labeled 'SHA' has been replaced with 'TEST_HEAD_PR_NUMBER' in a specific procedure of our work process that examines the condition of the test head pull request. This will improve the consistency and precision of our testing framework.

• Introduction of New Environment Variable
  We've incorporated a new environment variable called 'TEST_BASE_PR_NUMBER' into another part of the workflow that closes down the base pull request. This change will enhance the way we identify and handle pull requests, making the entire system more robust and reliable.

• Removed Redundant Code
  We have tidied up our code by getting rid of the part that sets the 'TEST_BASE_BRANCH_NAME' environment variable. This eliminates unnecessary complications and makes our software more efficient and straightforward to manage.

[github-actions]

Checks from Test PR #4880

Check	Status	Time
security/gitguardian	✅	0
Test in Pull Request	✅	1m1s
GitGuardian Security Checks	✅	3s

[github-actions]

Checks from Test PR #4882

Check	Status	Time
security/gitguardian	✅	0
Test in Pull Request	✅	1m6s
GitGuardian Security Checks	✅	1s

[accept-to-ship-bot]

This Pull Request is closed by a GitHub Action