Fix multisymbol issues

[wsmoses]

Discovered while looking at macos arm.

@mofeing do you know how to ensure the default is on the release not debug mode [it looks like I default hit debug, which was good for now, but also a problem in the future for users].

Incidentally otherwise the debug one works...

[mofeing]

what's the issue with SymbolTable? I mean it to fix it in upstream MLIR.jl

about the default artifact, let me try some stuff

[wsmoses]

The finalizer is otherwise broken

[mofeing]

Can you tell what does this code returns to you?

using Base.BinaryPlatforms
using Reactant_jll

Reactant_jll.augment_platform!(HostPlatform())

In my case, it correctly sets to opt mode:

julia> Reactant_jll.augment_platform!(HostPlatform())
macOS aarch64 {cuda=none, cxxstring_abi=cxx11, julia_version=1.10.4, libgfortran_version=5.0.0, mode=opt}