Address feedback - move GenerateNameForExpression functionality from shared layer up to Workspaces layer

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Implement ability to extract code into a new base class if there is no other base class already. 

* Uses shared code with similar things like Extract Interface and Pull Members Up
* Shares UI with those two features as well 

* Add ServiceLayer.Test that overrides any other layer or workspace kind.

Mark all services used for testing with ServiceLayer.Test.
Remove WorkspaceKind.Test and set the kind of TestWorkspace to `host`.

* Move MockWorkspaceEventListenerProvider to Fatures test composition

* Enable solution crawler in diagnostic tests

* Test compositions

* Eliminate TestExportProvider

* Fixes and caching

* Debugger proxies

* Scopes

* Feedback and more fixes

* RemoteHostOptions

* Throw without timeout on invalid thread switches

* EventCollectorTests requires a main thread

Added XAML LSP shims by introducing ILanguageServerProtocol and adding an optional Language parameter to the ExportLspMethodHandlerAttribute so that XAML can export its own LSP handlers.
Added a few extension methods to make dealing with TextDocuments easier.

Fixes #46075

Split and move down ISemanticFactsService to shared layer. This service is split into two parts, similar to `ISyntaxFacts` and `ISyntaxFactsService`:
1. `ISemanticFacts`, which is purely semantic query API, is now accessible from shared analyzer and code fixes layer.
2. `ISemanticFactsService`, which is semantic query + code transformation API as well as an `ILanguageService`, is only accessible from shared code fixes layer. It stays as being accessible via GetLanguageService API.

Co-authored-by: NJason Malinowski <jason@jason-m.com>

Fixes #45492