feat: Cli core upgrade

[shrutiburman]

Contributing to TwilioReasons to remove some e2e testcases: Removed some tests because:

• These testcases were deploying a new video app with actual api keys & secrets configured on circleci. It's unclear which account's creds are those. Also, second guessing the process of storing the secrets anywhere.
• The existing testing suite of deploying apps yields a 404 error from serverless api. Failed Pipeline run

Current coverage report:

All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.

• [x] I acknowledge that all my contributions will be made under the project's license.

[piyushtank]

We, SDK team attempted to review this PR but we do not have expertise on the codebase. So, we cannot give any meaningful feedbacks.