Log as error when we fail to validate an interpreter

[karrtikr]

[DEBUG 2021-11-9 14:47:26.679]: [Error: spawn cmd.exe ENOENT
	at Process.ChildProcess._handle.onexit (internal/child_process.js:269:19)
	at onErrorNT (internal/child_process.js:465:16)
	at processTicksAndRejections (internal/process/task_queues.js:80:21)] {
  errno: -4058,
  code: 'ENOENT',
  syscall: 'spawn cmd.exe',
  path: 'cmd.exe',
  spawnargs: [
    '/d',
    '/s',
    '/c',
    '""C:\\Users\\Christopher\\AppData\\Local\\Programs\\Python\\Python310\\python.exe" "c:\\Users\\Christopher\\.vscode\\extensions\\ms-python.python-2021.12.1559732655\\pythonFiles\\interpreterInfo.py""'
  ],
  cmd: '"C:\\Users\\Christopher\\AppData\\Local\\Programs\\Python\\Python310\\python.exe" "c:\\Users\\Christopher\\.vscode\\extensions\\ms-python.python-2021.12.1559732655\\pythonFiles\\interpreterInfo.py"'
}

Currently errors like this #18138 (comment) only appear in debug level.