* add the applicable new (versions 9.2 - 9.10) GHC flags to normaliseGhcArgs

Actionable flags are:
- fdiagnostics-as-json (changes the format GHC outputs its diagnostics)
- fprint-error-index-lists (changes the way GHC displays compile time)
- fbreak-points (enables/disables break-points in GHCi)
- dipe-stats (dumps information about which info tables have IPE
  information)
- ffamily-application-cache (only changes the speed of the compiler)
- fprint-redundant-promotion-ticks
- show-error-context
- unoptimized-core-for-interpreter (only applies to GHCi)

* [chore] correct the flag names and add a FUTUREWORK