Install jupyter instead of installing kernel spec (#10080)

* Install jupyter instead of installing kernel spec
For #10071

Author: DonJayamanne

news/2 Fixes/10071.md

@@ -0,0 +1 @@
+Re-install `Jupyter` instead of installing `kernelspec` if `kernelspec` cannot be found in the python environment.

src/client/datascience/jupyter/interpreter/jupyterInterpreterDependencyService.ts

@@ -57,6 +57,7 @@ function sortProductsInOrderForInstallation(products: Product[]) {
  * @returns {string}
  */
 export function getMessageForLibrariesNotInstalled(products: Product[], interpreterName?: string): string {
+    // Even though kernelspec cannot be installed, display it so user knows what is missing.
     const names = products
         .map(product => ProductNames.get(product))
         .filter(name => !!name)