switch to using python3 in the script for no-config debugging (microsoft#576)

* switch to using python3 in the script for no-config debugging

* update python3 to python in some cases

Author: eleanorjboyd

bundled/scripts/noConfigScripts/debugpy

@@ -1,3 +1,3 @@
 #! /bin/bash
 # Bash script
-python $BUNDLED_DEBUGPY_PATH --listen 0 --wait-for-client $@
+python3 $BUNDLED_DEBUGPY_PATH --listen 0 --wait-for-client $@

bundled/scripts/noConfigScripts/debugpy.fish

@@ -1,2 +1,2 @@
 # Fish script
-python $BUNDLED_DEBUGPY_PATH --listen 0 --wait-for-client $argv
+python3 $BUNDLED_DEBUGPY_PATH --listen 0 --wait-for-client $argv

bundled/scripts/noConfigScripts/debugpy.ps1

@@ -1,2 +1,6 @@
 # PowerShell script
-python $env:BUNDLED_DEBUGPY_PATH --listen 0 --wait-for-client $args
+if ($PSVersionTable.OS -match "Windows") {
+    python $env:BUNDLED_DEBUGPY_PATH --listen 0 --wait-for-client $args
+} else {
+    python3 $env:BUNDLED_DEBUGPY_PATH --listen 0 --wait-for-client $args
+}