Summary: Refactored to make code more modular and keep the error message in one place.

Test Plan:
1. Aborted EditUniverse.
2. Ran node action. Verified right error message was printed.
3. Gflags rerun.

Itests should cover more.

{F293989}

Reviewers: vkumar, yshchetinin, sanketh, cwang, nbhatia

Reviewed By: vkumar, cwang

Subscribers: yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D38610