Support diff mode in modules

[Klaas-]

SUMMARY

While writing a new module I noticed it's fairly easy to allow diff mode to work. I would suggest to add this to all modules.

Example
https://github.com/ansible-collections/azure/blob/12dfaec1d674bc840b6c6e6cece6d5bcbc1aa6e6/plugins/modules/azure_rm_recoveryservicesvault_config.py

ISSUE TYPE

• Feature Idea

COMPONENT NAME

All