DEV-5085 Improve `Branch-Blockchain` CI/CD

[HarryVasanth]

Why?

Currently, CI/CD actions are working on both PRs and Master branch at the same time, so if a PR fails, the master is “broken”

Solution Overview

Separate CI/CD actions to distinguish the differences.

Implementation Details

3 Different CI/CD actions:

• ga-image-sanitize
• ga-image-build-master
• ga-image-sanitize