Send Roslyn formatting options to OOP

[davidwengier]

Roslyn respects the formatting options in the workspace, but in OOP they're always defaults which means #11276 will regress in cohosting.

Roslyn normally gets their options via callbacks from OOP, but as we call into the LSP handlers they won't do that. We'll have to work out how to provide them.

NOTE: This would also presumably apply to things like CodeGenerationOptions for code actions etc. so might be worth a generic solution of some kind, but that might be overkill.