bootstrap: reset process._exit and process.exitCode in pre-execution

PR-URL: nodejs/node#42466
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Khaidi Chu <i@2333.moe>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>

lib/internal/bootstrap/pre_execution.js

@@ -110,6 +110,9 @@ function patchProcessObject(expandArgv1) {
     configurable: getOptionValue('--build-snapshot'),
     value: process.argv[0]
   });
+
+  process.exitCode = undefined;
+  process._exiting = false;
   process.argv[0] = process.execPath;
 
   if (expandArgv1 && process.argv[1] &&