feat: delete repository secret on unregistering repository

[4molybdenum2]

Signed-off-by: Tathagata Paul tathagatapaul7@gmail.com

This PR will automatically delete repository secret on unregistering the repository.

[conventional-commit-lint-gcf]

🤖 I detect that the PR title and the commit message differ and there's only one commit. To use the PR title for the commit history, you can use Github's automerge feature with squashing, or use automerge label. Good luck human!

-- conventional-commit-lint bot
https://conventionalcommits.org/

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

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[ChristopherFry]

Thank you for creating the pull request! I left a comment in the code with two scenarios we'll need to make sure we take into consideration. Additionally, be sure to complete the CLA if you haven't already. Without this, I won't be able to merge your changes.

[4molybdenum2]

👍