[suggestion] Follow convention of new and into_parts across data model

[0x009922]

Original proposal from @mversic & #4341 (comment)

The idea is to follow a convention in the data model and all other places across the workspace:

• We use new as a main method to create structures, usually from internal parts (it is already followed)
• For a reverse conversion from a structure into its parts, we should use a method named into_parts

[mversic]

let's have a separate meeting where we have discuss having data model transparent instead of getter functions