perf_hooks: make GC tracking state per-Environment

Otherwise this is global state that may be subject to race
conditions e.g. when running `perf_hooks` inside of Worker threads.

Tracking the GC type is removed entirely since the variable was unused.

PR-URL: https://github.com/nodejs/node/pull/25053


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>