Fix codegen not handling invoke exprs with Codeinstances iwith jl_fptr_sparam_addr invoke types. (#56817)
fixes https://github.com/JuliaLang/julia/issues/56739
I didn't succeed in making a test for this. The sole trigger seems to be
```julia
using HMMGradients
T = Float32
A = T[0.0 1.0 0.0; 0.0 0.5 0.5; 1.0 0.0 0.0]
t2tr = Dict{Int,Vector{Int}}[Dict(1 => [2]),]
t2IJ= HMMGradients.t2tr2t2IJ(t2tr)
Nt = length(t2tr)+1
Ns = size(A,1)
y = rand(T,Nt,Ns)
c = rand(Float32, Nt)
beta = backward(Nt,A,c,t2IJ,y)
gamma = posterior(Nt,t2IJ,A,y)
```
in @oscardssmith memorynew PR
One other option is to have the builtin handle receiving a CI. That
might make the code cleaner and does handle the case where we receive a
dynamic CI (is that even a thing)
julia
ece1c701 - Fix codegen not handling invoke exprs with Codeinstances iwith jl_fptr_sparam_addr invoke types. (#56817)
