Support for FixedSizeArrays

[oschulz]

Reactant currently doesn't know how to convert a FixedSizeArray:

julia> using Reactant, FixedSizeArrays

julia> Reactant.to_rarray(FixedSizeArray(rand(Float32, 100)))
ERROR: TypeError: in new, expected DataType, got Type{Memory{Float32}}
Stacktrace:
  [1] make_tracer_unknown(seen::Reactant.OrderedIdDict{…}, prev::Any, path::Any, mode::Reactant.TraceMode; track_numbers::Type, sharding::Any, runtime::Any, kwargs::@Kwargs{…})
    @ Reactant /local/scratch/user/.julia/dev/Reactant/src/Tracing.jl:1046
  [2] make_tracer_unknown
    @ /local/scratch/user/.julia/dev/Reactant/src/Tracing.jl:1009 [inlined]
  [3] #make_tracer#134
    @ /local/scratch/user/.julia/dev/Reactant/src/Tracing.jl:1146 [inlined]
  [4] make_tracer_unknown(seen::Reactant.OrderedIdDict{…}, prev::Any, path::Any, mode::Reactant.TraceMode; track_numbers::Type, sharding::Any, runtime::Any, kwargs::@Kwargs{…})
    @ Reactant /local/scratch/user/.julia/dev/Reactant/src/Tracing.jl:1090
  [5] make_tracer_unknown
    @ /local/scratch/user/.julia/dev/Reactant/src/Tracing.jl:1009 [inlined]
  [6] #make_tracer#134
    @ /local/scratch/user/.julia/dev/Reactant/src/Tracing.jl:1146 [inlined]
  [7] to_rarray_internal(x::Any, track_numbers::Type, sharding::Any, runtime::Any, device::Any, client::Any)
    @ Reactant /local/scratch/user/.julia/dev/Reactant/src/Tracing.jl:1848
  [8] #to_rarray#156
    @ /local/scratch/user/.julia/dev/Reactant/src/Tracing.jl:1837 [inlined]
  [9] to_rarray(x::Any)
    @ Reactant /local/scratch/user/.julia/dev/Reactant/src/Tracing.jl:1827
 [10] top-level scope
    @ REPL[43]:1

[wsmoses]

cc @giordano

[giordano]

How does one support a new array container?

[wsmoses]

basically https://github.com/EnzymeAD/Reactant.jl/blob/main/ext/ReactantOneHotArraysExt.jl