Feature request: add AllLibraryTransitiveGroups

[fingolfin]

This function would do the same as AllTransitiveGroups, but would not issue warning if no degree is specified. This is useful if one wants to just get all available library groups with a certain property, but does not want to get a warning, as in this example:

gap> AllTransitiveGroups(Size, 100);
#W  AllTransitiveGroups: Degree restricted to [2..30]
[ [1/2.D(5)^2]2, 1/2[D(5)^2]2, t20n24, t20n25, t20n26, t20n27, t20n28, t20n29, t25n7, t25n8, t25n9, t25n10, t25n11, t25n12 ]

Of course it would also be possible to get this some other way; e.g. one could make it so that AllTransitiveGroups( Degree, "any", Size, 100 ) hides the warning.

This would be useful for the ctbllib package