lang/spidermonkey128: Backport "JS_RemoveExtraGCRootsTracer removes..."

Patch spidermonkey128 with a bug fix that's present in spidermonkey140
already, but which also affects spidermonkey128.

https://bugzilla.mozilla.org/show_bug.cgi?id=1982134
https://github.com/mozilla-firefox/firefox/commit/bf1994b05bae

PR: 293620
Reviewed by: asomers
Approved by: vishwin (maintainer timeout)