debugger: apply automatic lint fixes for _inspect.js

For issues that ESLint can fix automatically, fix them.

PR-URL: https://github.com/nodejs/node/pull/38411


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>