Update Python to 3.8.8 (#15278)

* update python fwlinks and remove bundle ver

* start fixing path for users with python 36

* prompt user for python version upgrade

* update python path after removing 3.6

* prompt users to upgrade and show pkg warning

* make prompt async

* remove python bundle ver from ML extension

* shutdown python 3.6 before deleting

* check useExistingPython before update prompt

* add dont ask again option

* remove 3.6 after installing 3.8

fix merge conflict

* give option to remove python36

* list user installed pip packages in warning

* create notebook to install pip packages

* update getPythonExePath method and add comments

* clean up code

* add comments

* pr comments

* add comment

* remove option to keep python36

* shutdown active servers before removing python36

* fix error removing old python w/ path change

* update to 3.8.10

* restart sessions for mac/linux

extensions/machine-learning/src/common/utils.ts

@@ -64,13 +64,6 @@ export function getPythonInstallationLocation(rootFolder: string) {
 	return path.join(rootFolder, 'python');
 }
 
-export function getPythonExePath(rootFolder: string): string {
-	return path.join(
-		getPythonInstallationLocation(rootFolder),
-		constants.pythonBundleVersion,
-		process.platform === constants.winPlatform ? 'python.exe' : 'bin/python3');
-}
-
 export function getPackageFilePath(rootFolder: string, packageName: string): string {
 	return path.join(
 		rootFolder,
@@ -272,7 +265,6 @@ export function getFileName(filePath: string) {
 export function getDefaultPythonLocation(): string {
 
 	return path.join(getUserHome() || '', 'azuredatastudio-python',
-		constants.adsPythonBundleVersion,
 		getPythonExeName());
 }