LibJS: Replace GlobalObject with VM in Intl AOs [Part 1/19]

Instead of passing a GlobalObject everywhere, we will simply pass a VM,
from which we can get everything we need: common names, the current
realm, symbols, arguments, the heap, and a few other things.

In some places we already don't actually need a global object and just
do it for consistency - no more `auto& vm = global_object.vm();`!

This will eventually automatically fix the "wrong realm" issue we have
in some places where we (incorrectly) use the global object from the
allocating object, e.g. in call() / construct() implementations. When
only ever a VM is passed around, this issue can't happen :^)

I've decided to split this change into a series of patches that should
keep each commit down do a somewhat manageable size.

Userland/Libraries/LibJS/Runtime/Intl/Intl.cpp

@@ -66,7 +66,7 @@ JS_DEFINE_NATIVE_FUNCTION(Intl::get_canonical_locales)
     auto locales = vm.argument(0);
 
     // 1. Let ll be ? CanonicalizeLocaleList(locales).
-    auto locale_list = TRY(canonicalize_locale_list(global_object, locales));
+    auto locale_list = TRY(canonicalize_locale_list(vm, locales));
 
     MarkedVector<Value> marked_locale_list { vm.heap() };
     marked_locale_list.ensure_capacity(locale_list.size());