Share provider doesn't receive selection

[ulugbekna]

Testing #183574

My extension's provider is not receiving the selection within the ShareableItem passed to its provideShare

I think this's caused by this -

vscode/src/vs/workbench/contrib/share/browser/share.contribution.ts

Line 87 in ef372f4

const uri = await shareService.provideShare({ resourceUri }, new CancellationTokenSource().token);