Add permutation_character(G::GAPGroup, H::GAPGroup)

[ThomasBreuer]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.89%. Comparing base (e5cef2e) to head (419a5e7).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5055   +/-   ##
=======================================
  Coverage   84.88%   84.89%           
=======================================
  Files         707      707           
  Lines       95344    95349    +5     
=======================================
+ Hits        80933    80946   +13     
+ Misses      14411    14403    -8     

Files with missing lines	Coverage Δ
src/GAP/wrappers.jl	95.38% <100.00%> (+0.01%)	⬆️
src/Groups/group_characters.jl	97.08% <100.00%> (+0.01%)	⬆️

... and 1 file with indirect coverage changes

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