TFNFR30 - Handling Deprecated Outputs

Sometimes we notice that the name of certain output is not appropriate anymore, however, since we have to ensure forward compatibility in the same major version, its name MUST NOT be changed directly. It MUST be moved to an independent deprecated_outputs.tf file, then redefine a new output in output.tf and make sure it’s compatible everywhere else in the module.

A cleanup SHOULD be performed to deprecated_outputs.tf and other logics related to compatibility during a major version upgrade.