Bug
1838629 - Part 6: Add a nursery pointer to RootingContext r=sfink
The inlined allocation functions are going to need to get a pointer to the
nursery without going through JSContext, which may not be visible (in fact this
causes a header dependency cycle if we try to include it in Allocator.h).
This adds a nursery pointer to JSContext's superclass. This already contains
zone and realm pointers for similar reasons.
Depends on
D181193
Differential Revision: https://phabricator.services.mozilla.com/
D181194