`TypeError` in `tape_copy` for newer versions of Julia

[FredericWantiez]

Seems like allocate_binding! fails on a TypeError with newer versions of Julia. For example, on julia 1.9, the tape_copy tests fail on something similar to this:

  Got exception outside of a @test
  TypeError: in Type, in parameter, expected Type, got a value of type Pair{String, Int64}
  Stacktrace:
    [1] allocate_binding!(var::Core.SSAValue, bindings::Vector{Any}, c::Core.Const)
      @ Libtask ~/Documents/projects/turing/Libtask.jl/src/tapedfunction.jl:299
    [2] bind_var!(var::Core.SSAValue, bindings::Vector{Any}, ir::Core.CodeInfo)

This breaks CI and is likely the issue here TuringLang/Turing.jl#1973

[yebai]

@KDr2