fix: Resolved the issue with dev container

[Prekshith-Microsoft]

This pull request addresses a potential issue with expired GPG keys for the Yarn repository in the development container setup. The change removes the Yarn repository configuration to prevent related errors during builds.

• Dev container maintenance:
  • .devcontainer/Dockerfile: Removed the Yarn repository (yarn.list) to avoid GPG key expiration issues that can break package installation.## Purpose

• ...

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

• ...

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