tests: Fix flaky JSArrayBuffer test

[No9]

The JSArrayBuffer has failed in node 18 in lldb versions 8, 11, 13, 14 but when re-ran they all pass.
It's not clear what is causing it so we have it to optional in this PR
#419

Opening this to capture that it needs to be looked at and resolved if work is carried out in this area.

[tony-go]

Maybe could we close this one? @No9

[No9]

Not sure why we want to close it @tony-go
I opened it to capture that we have set JSArrayBuffer to optional which isn't ideal and should be looked at.
That is still an issue I think unless there Is there something I've missed?

[tony-go]

I opened it to capture that we have set JSArrayBuffer to optional which isn't ideal and should be looked at.

My bad 🙌