[refactor][fix] Update reinstall logic

* Only set reinstall flag if new accept_changes file exists
* Instead of stopping highstate from running, kill all salt processes and remove their configs
* Make end of non-reinstall logs clear in cases where user cancels (and log not rotated)

setup/so-variables

@@ -21,6 +21,9 @@ export node_es_port
 setup_log="/root/sosetup.log"
 export setup_log
 
+change_file="/root/accept_changes"
+export change_file
+
 filesystem_root=$(df / | awk '$3 ~ /[0-9]+/ { print $2 * 1000 }')
 export filesystem_root