docs: Comprehensive guide for migrating an Azure Web App Service

[Roopan-Microsoft]

Purpose

• This pull request adds a comprehensive guide for migrating an Azure Web App Service to a new container registry. The guide provides detailed steps to ensure a smooth transition.

Documentation updates:

• docs/container_registry_migration.md: Added a new guide titled "Migrating Azure Web App Service to a New Container Registry," which includes an overview of the current problem and goal, prerequisites, and step-by-step instructions for updating the Azure Web App Service configuration and validating the deployment.

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation - NA

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

Deployment Validation - NA

• 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

• I have built and tested the code locally and in a deployed app
• For frontend changes, I have pulled the latest code from main, built the frontend, and committed all static files.
• This is a change for all users of this app. No code or asset is specific to my use case or my organization.

Other Information

[github-actions]

🎉 This PR is included in version 1.0.0 🎉

The release is available on GitHub release

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