can_setindex must be false for CUSPARSE arrays

[hexaeder]

cuSPARSE arrays implement no setindex! at all, but can_setindex falls back to true
for them, so callers that guard mutation with it crash instead of taking their
non-mutating path:

julia> A = CuSparseMatrixCSC(sparse(Float64[1 0; 0 1]));

julia> ArrayInterface.can_setindex(A)   # should be false
true

julia> A[1, 2] = 1.0
ERROR: CanonicalIndexError: setindex! not defined for CuSparseMatrixCSC{Float64, Int32}

This declares can_setindex = false for the cuSPARSE types in the CUDA extension, with a
test in test/gpu/cuda.jl. The AMDGPU/Metal sparse types might need the same; I left them
alone as I can't test them.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 59.89%. Comparing base (b51dc3b) to head (d1a1cc6).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
ext/ArrayInterfaceCUDAExt.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #495      +/-   ##
==========================================
- Coverage   60.00%   59.89%   -0.11%     
==========================================
  Files          15       15              
  Lines         590      591       +1     
==========================================
  Hits          354      354              
- Misses        236      237       +1     

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