Add triangular operators for AMD and NVIDIA GPUs

[amontoison]

No description provided.

[amontoison]

@michel2323 Can you test this branch on AMD GPUs?

[michel2323]

I get this error below only in

KrylovPreconditioners.jl/ext/AMDGPU/operators.jl

Line 150 in 86c7165

rocSPARSE.rocsparse_spsv(rocSPARSE.handle(), A.transa, alpha, A.descA, descX, descY, T,

. I looked at the other spsv's and I can't figure out what the problem is. The test for X and Y in line 160 works.

  ROCSPARSEError: (code 3, rocsparse_status_invalid_pointer)
  Stacktrace:
    [1] macro expansion
      @ /lustre/orion/csc359/scratch/mschanen/julia_depot/dev/AMDGPU/src/sparse/error.jl:62 [inlined]
    [2] rocsparse_spsv(handle::Ptr{AMDGPU.rocSPARSE._rocsparse_handle}, trans::Char, alpha::Base.RefValue{Float64}, mat::AMDGPU.rocSPARSE.ROCSparseMatrixDescriptor, x::AMDGPU.rocSPARSE.ROCDenseVectorDescriptor, y::AMDGPU.rocSPARSE.ROCDenseVectorDescriptor, compute_type::Type, alg::AMDGPU.rocSPARSE.rocsparse_spsv_alg_, stage::AMDGPU.rocSPARSE.rocsparse_spsv_stage_, buffer_size::Base.RefValue{UInt64}, temp_buffer::ROCArray{UInt8, 1, AMDGPU.Runtime.Mem.HIPBuffer})
      @ AMDGPU.rocSPARSE /lustre/orion/csc359/scratch/mschanen/julia_depot/dev/AMDGPU/src/sparse/librocsparse.jl:5137
    [3] ldiv!(y::ROCArray{Float64, 1, AMDGPU.Runtime.Mem.HIPBuffer}, A::KrylovPreconditionersAMDGPUExt.AMD_TriangularOperator{Float64}, x::ROCArray{Float64, 1, AMDGPU.Runtime.Mem.HIPBuffer})
      @ KrylovPreconditionersAMDGPUExt /lustre/orion/csc359/scratch/mschanen/git/KrylovPreconditioners.jl/ext/AMDGPU/operators.jl:150