add gc roots and gc finalist roots to fix unrooted nodes

[JianFangAtRai]

PR Description

What does this PR do?

This PR is to fix the issue: JuliaLang#52432

1. Fixed unrooted nodes from gc_mark_roots and added a GC root to them
2. Fixed unrooted nodes from gc_mark_finlist and added a finlist root to them
3. Added logic to check nodes without any incoming edges and print them out when serialize heap snapshot

The resulting output is as follows for snapshotting julia process

julia> using Profile

julia> Profile.take_heap_snapshot("jf-julia.heapsnapshot")
node count: 1384919
edge count: 4407344
orphan node count: 0
orphan nodes: []
"jf-julia.heapsnapshot"

The containment view on chrome DevTools:

Checklist

• I have opened an issue or PR upstream on JuliaLang/julia: heap snapshot: add gc roots and gc finalist roots to fix unrooted nodes JuliaLang/julia#52618
• I have removed the port-to-* labels that don't apply: only keep the port-to-v1.9 label
• I have opened a PR on raicode to test these changes: https://github.com/RelationalAI/raicode/pull/17030

[d-netto]

@JianFangAtRai, could you please tidy up the Checklist with requirements for merging?

[JianFangAtRai]

@JianFangAtRai, could you please tidy up the Checklist with requirements for merging?
Here is the check list:

• I have opened an issue or PR upstream on JuliaLang/julia: heap snapshot: add gc roots and gc finalist roots to fix unrooted nodes JuliaLang/julia#52618
• I have removed the port-to-* labels that don't apply: only keep the port-to-v1.9 label
• I have opened a PR on raicode to test these changes: https://github.com/RelationalAI/raicode/pull/17030

[d-netto]

👍