add Adjoint/Transpose(::Char). fix #25242

[KlausC]

JuliaLang/LinearAlgebra.jl#495

[andyferris]

My suggestion is to instead use the newer, shorter invocation of permutedims for "data" transposing, and leave adjoint and transpose for linear algebra purposes.

char_mat = ['a' 'b';
            'c' 'd']
permutedims(char_mat)

[JeffBezanson]

-1. We shouldn't need to add methods like this to avoid segfaults (or, ideally, even stack overflows).