perf_hooks,trace_events: use stricter equality

There is no need to use loose equality on these checks because
undefined is caught by the preceding typeof check.

PR-URL: https://github.com/nodejs/node/pull/28166


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>