StrideArrays with `ComplexF32`?

X-ref https://github.com/MasonProtter/Bumper.jl/issues/34

cc @MasonProtter

I think there is an issue with complex input and some operators. For these it might make sense to have a fallback method available? MWE:

```julia
julia> using StrideArrays

julia> let a = StrideArray{ComplexF32}(undef, 10)
a .= 1
a .= cos.(a)
end
ERROR: MethodError: no method matching vmaterialize!(::StrideArray{…}, ::Base.Broadcast.Broadcasted{…}, ::Val{…}, ::Val{…}, ::Val{…})

Closest candidates are:
vmaterialize!(::Any, ::Any, ::Val{Mod}, ::Val{UNROLL}) where {Mod, UNROLL}
@ LoopVectorization ~/.julia/packages/LoopVectorization/7gWfp/src/broadcast.jl:753
vmaterialize!(::Union{Adjoint{T, A}, Transpose{T, A}}, ::BC, ::Val{Mod}, ::Val{UNROLL}, ::Val{dontbc}) where {T<:Union{Bool, Float16, Float32, Float64, Int16, Int32, Int64, Int8, UInt16, UInt32, UInt64, UInt8, SIMDTypes.Bit}, N, A<:AbstractArray{T, N}, BC<:Union{Base.Broadcast.Broadcasted, LoopVectorization.Product}, Mod, UNROLL, dontbc}
@ LoopVectorization ~/.julia/packages/LoopVectorization/7gWfp/src/broadcast.jl:682
vmaterialize!(::AbstractArray{T, N}, ::BC, ::Val{Mod}, ::Val{UNROLL}, ::Val{dontbc}) where {T<:Union{Bool, Float16, Float32, Float64, Int16, Int32, Int64, Int8, UInt16, UInt32, UInt64, UInt8, SIMDTypes.Bit}, N, BC<:Union{Base.Broadcast.Broadcasted, LoopVectorization.Product}, Mod, UNROLL, dontbc}
@ LoopVectorization ~/.julia/packages/LoopVectorization/7gWfp/src/broadcast.jl:673
...

Stacktrace:
[1] vmaterialize!
@ LoopVectorization ~/.julia/packages/LoopVectorization/7gWfp/src/broadcast.jl:759 [inlined]
[2] _materialize!
@ StrideArrays ~/.julia/packages/StrideArrays/PeLtr/src/broadcast.jl:181 [inlined]
[3] materialize!(dest::StrideArray{…}, bc::Base.Broadcast.Broadcasted{…})
@ StrideArrays ~/.julia/packages/StrideArrays/PeLtr/src/broadcast.jl:188
[4] top-level scope
@ REPL[9]:3
```

Reproduce the MWE in the issue, then inspect StrideArrays/src/broadcast.jl around _materialize! and materialize!, along with the referenced LoopVectorization/src/broadcast.jl vmaterialize! methods. Determine how complex input is handled and whether a fallback is appropriate. Done means the shown ComplexF32 broadcast operations no longer raise the reported MethodError.

Written by the indexing model from the issue text.