P3A Utility Optimizations

[DJAndries]

Improve STAR recovery rates by allowing reordering of metric attributes, and allowing reporting of alternative, optional attributes. Each metric would have its own configuration. This feature will allow stakeholders to choose the necessary trade-offs for each metric.

Alternative attributes would include:

• region and subregion: from UN M49 region/subregion list (i.e. region = Americas, subregion = North America)
• general_platform: platform identifier without the CPU architecture component

cc @AliShahin

[GeetaSarvadnya]

@DJAndries: Can you add test plan is the issue? Thanks!

cc: @LaurenWags