console: fix timeEnd() not coercing the input

The input of console.timeEnd() was not coerced to a string. That way
labels were not found and the entry was not removed anymore.

PR-URL: https://github.com/nodejs/node/pull/21779


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>