ci: Update email subjects to include status icons

[Vamshi-Microsoft]

Purpose

This pull request updates the email notification subjects in the .github/workflows/job-send-notification.yml workflow to include clear success (✅) and failure (❌) icons at the beginning of the subject line. This makes it easier for recipients to quickly identify the outcome of CI/CD pipeline runs.

Notification subject improvements:

• Added a failure icon (❌) at the start of email subjects for insufficient quota, deployment failure, and E2E test failure notifications. [1] [2] [3] [4]
• Added a success icon (✅) at the start of email subjects for successful deployment and test automation completion notifications. [1] [2]

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

Verify that the following are valid

• ...

Other Information

[github-actions]

🎉 This PR is included in version 1.2.4 🎉

The release is available on GitHub release

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