[FEATURE] Extend createDeltaPackage command logic to include multiple key:value pairs in the sourceTargetMapping

[anasilva105]

Is your feature request related to a problem? Please describe.
Right we can only configure one pair of deployment source to deploy target in sourceTargetMapping in the mcdevrc.json config.
The idea would be to provide an opportunity to configure multiple source to target entries (for example for specific environments) and select one of them when running the cdp command. If the value is not provided in the command then it should run the default configured.

Describe the solution you'd like

Have a default entry and other configured sourceTargetMapping:

run the command mcdev cdp qa --targetMapping="deployment-source-qa" would build the templates only for the Business Units in the deployment-target-prod

Describe alternatives you've considered

Have the cdp command with the parameters of build. For example mcdev cdp --buFrom "ACN/QA" --marketFrom "QA" -- buTo "ACN/PROD" --marketTo "PROD" ....