Add more tests for Block-GMRES

[amontoison]

Block-GMRES is the first Block-Krylov method in Krylov.jl.
I still need to do some tasks of this list.

[amontoison]

julia> X, stats = block_gmres(A, B, reorthogonalization=true)
ERROR: UndefVarError: `Ψtmp` not defined in `Krylov`
Suggestion: check for spelling errors or missing imports.
Stacktrace:
 [1] block_gmres!(solver::BlockGmresSolver{…}, A::CuArray{…}, B::CuArray{…}; M::UniformScaling{…}, N::UniformScaling{…}, ldiv::Bool, restart::Bool, reorthogonalization::Bool, atol::Float32, rtol::Float32, itmax::Int64, timemax::Float64, verbose::Int64, history::Bool, callback::Krylov.var"#1106#1120", iostream::Core.CoreSTDOUT)
   @ Krylov ~/.julia/packages/Krylov/FdZzQ/src/block_gmres.jl:236
 [2] block_gmres!
   @ ~/.julia/packages/Krylov/FdZzQ/src/block_gmres.jl:94 [inlined]
 [3] #block_gmres#1104
   @ ~/.julia/packages/Krylov/FdZzQ/src/krylov_solve.jl:169 [inlined]
 [4] top-level scope
   @ REPL[8]:1
Some type information was truncated. Use `show(err)` to see complete types