Notebooks: Use new Python installation after configuration change (#14765)

* start new jupyter server

* restart session working (removed extra code)

* only restart server once

* shutdown session first then stop server

* add comments remove extra lines

* add comment

* fix test

* only restart jupyter sessions

* Dispose jupytersessionmanager and create new one

* move restart server logic out of notebookmodel

* move methods to azdata proposed

* pr comment

src/sql/workbench/api/browser/mainThreadNotebook.ts

@@ -255,6 +255,14 @@ class SessionManagerWrapper implements azdata.nb.SessionManager {
 			this._specs = specs;
 		}
 	}
+
+	shutdownAll(): Thenable<void> {
+		return this._proxy.ext.$shutdownAll(this.managerHandle);
+	}
+
+	dispose(): void {
+		return this._proxy.ext.$dispose(this.managerHandle);
+	}
 }
 
 class SessionWrapper implements azdata.nb.ISession {