fix: Update deploy.yml - Replace solution prefix logic, add createdDate tag and enforce cleanup with always()

[Prasanjeet-Microsoft]

Purpose

• Replaced the logic for generating a unique solution prefix with a more consistent environment name using a timestamp and random suffix.
• Added createdDate tag while creating the resource group for better traceability and auditing.
• Added if: always() to ensure cleanup steps are executed regardless of prior job success/failure.
• Helps avoid leftover Azure resources and unnecessary costs due to partial failures.

Does this introduce a breaking change?

• Yes
• No

What to Check

Verify that the following are valid:

• Ensure the new environment name logic produces a valid and unique string.
• Verify the createdDate tag is correctly added in the resource group creation step.
• Confirm the cleanup step works as expected even if earlier steps fail, due to if: always().

[github-actions]

🎉 This PR is included in version 1.2.0 🎉

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