Review input variable descriptions

[vburckhardt]

Description

Some confusions - not an exhaustive list - may be worth a review with @SirSpidey :

• Indicate when an input refers to an existing resource. Prefix the variable name with existing_ if possible. This will help distinguish between resource created by the DA and existing resources that are prereq to run the DA
• Indicate where some variables are related - eg: some variables enable to take either the crn, id, or guid.
• Avoid some acronyms that are not obvious to most users - eg: PAT.
• ...

New or affected modules

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[huayuenh]

Will prioritise reducing inputs first #387

[padraic-edwards]

Will be addressing this in an upcoming release, reducing the number of optional properties, grouping related variables and improving descriptions.