Fix #4356 New Notebook from connection doesn't connect (#4364)

* Fix #4356 New Notebook from connection doesn't connect
Fix new notebook error by passing profile instead of ID.
- I could've just sent the ID over, but this fix sets the stage for disconnected connections to work (since we have enough info to properly connect).
- There's a bug in NotebookModel blocking the disconnected connection part working, but Yurong's in progress fixes will unblock this. Hence checking in as-is and working to properly unblock once that's in.

* Support connection profile in commandline service
- Added new context API for things that want to work on commandline and object explorer
- Refactored commandlineservice slightly to be async & have a simpler execution flow (far fewer if/else statements)

* Fix unit tests
- Fixed 2 issues raised by tests (sholdn't do new query if no profile passed, shouldn't error on new query failing)
- Updated unit tests to pass as expected given changes to the APIs.

extensions/notebook/src/jupyter/jupyterController.ts

@@ -152,7 +152,7 @@ export class JupyterController implements vscode.Disposable {
 				this.apiWrapper.showErrorMessage(localize('unsupportedFileType', 'Only .ipynb Notebooks are supported'));
 			} else {
 				await azdata.nb.showNotebookDocument(fileUri, {
-					connectionId: profile.id,
+					connectionProfile: profile,
 					providerId: constants.jupyterNotebookProviderId,
 					preview: false
 				});
@@ -165,7 +165,7 @@ export class JupyterController implements vscode.Disposable {
 		// to handle this. We should look into improving this in the future
 		let untitledUri = vscode.Uri.parse(`untitled:Notebook-${untitledCounter++}`);
 		let editor = await azdata.nb.showNotebookDocument(untitledUri, {
-			connectionId: profile.id,
+			connectionProfile: profile,
 			providerId: constants.jupyterNotebookProviderId,
 			preview: false,
 			defaultKernel: {