`@trace` function definition

[avik-pal]

@trace function foo(x, y)
       return x .+ y
end

into something like

function foo(x, y)
	if ReactantCore.within_compile()
        return traced_call(foo_internal, x, y)
    else
        return foo_internal(x, y)
    end
end

function foo_internal(x, y)
       return x .+ y
end

[avik-pal]

I am trying to reduce compile times in LuxDL/Lux.jl#1484 and here we should always be able to cache the AbstractLuxLayer dispatches (at least for the ones in Lux)