Overload array constructors for BunchKaufman (#1461)

[dlfivefifty]

This adds overloads for array conversion for BunchKaufman. This fixes a regression in Julia v1.12-rc3:

julia> a = randn(5,5); A = a'a; F = factorize(A);

julia> typeof(F) # Was a Cholesky in v1.11
BunchKaufman{Float64, Matrix{Float64}, Vector{Int64}}

julia> Array(F) # Succeeded for Cholesky
ERROR: MethodError: no method matching Array(::BunchKaufman{Float64, Matrix{Float64}, Vector{Int64}})
The type `Array` exists, but no method is defined for this combination of argument types when trying to construct it.

Closest candidates are:
  Array(::QL)
   @ MatrixFactorizations ~/Projects/MatrixFactorizations.jl/src/ql.jl:204
  Array(::Eigen)
   @ LinearAlgebra ~/Projects/julia-1.12/usr/share/julia/stdlib/v1.12/LinearAlgebra/src/eigen.jl:682
  Array(::UniformScaling, ::Tuple{Int64, Int64})
   @ LinearAlgebra ~/Projects/julia-1.12/usr/share/julia/stdlib/v1.12/LinearAlgebra/src/uniformscaling.jl:437
  ...

Stacktrace:
 [1] top-level scope
   @ REPL[52]:1

See discussion here: #1461

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.89%. Comparing base (7b21cab) to head (23e122f).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1466   +/-   ##
=======================================
  Coverage   93.89%   93.89%           
=======================================
  Files          34       34           
  Lines       15926    15928    +2     
=======================================
+ Hits        14953    14956    +3     
+ Misses        973      972    -1     

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