Getting Info Table Profiling to the finish line

[Hécate]

Hello fellow devs,

I am indexing the work necessary to bring Info Table Profiling to the 
finish line: Seamless for the user to employ.

Some of the tickets refer to external ticket trackers, they have been 
marked as FOREIGN. Their counterpart tickets will be opened there when 
the situation unlocks on our side.

The epic is at https://gitlab.haskell.org/groups/ghc/-/epics/3

Please feel free to link future tickets that are related to this newer, 
better way of doing space profiling.

My thanks to Matthew Pickering, David Eichmann, and Ben Gamari.

Cheers,
Hécate (with a project manager hat on, apparently!)

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