update: consolidate the VC sync script runners into 1 image from 3

• update: address the code smell as reported by sonar and linters

• update: consolidate the VC sync script runners into 1 image from 3

The entrypoints of the containers are already overwritten by the cron commands, so there is no use in differentiating the containers at this point. Going forward, it will be a single reused base image with different args set for both local and remote runs. This should greatly simplify future maintenance.