global option `NoPrecomputedData`

[ThomasBreuer]

This option appears in a few places in the library, likely for debugging or testing purposes,
but it is not documented, and it is not used in CI tests.

I stumbled over this option when reviewing #6482.
Before that pull request got merged, the following input caused an infinite recursion.

gap> MaximalSubgroupClassReps( AlternatingGroup(6) : NoPrecomputedData );
#I  Alternating recognition needed!
#I  Alternating recognition needed!
#I  Alternating recognition needed!
[...]

The option looks useful.
It should become documented, and should be used in CI tests.