Bug 1755331 - Skip simulated OOM checks in wasm::Realm::registerInstance. r=lth

    InstanceComparator cmp(instance);

    size_t index;

    // The following section is not unsafe, but simulated OOM do not consider

    // the fact that these insert calls are guarded by the previous reserve

    // calls.

    AutoEnterOOMUnsafeRegion oomUnsafe;

    (void)oomUnsafe;

    MOZ_ALWAYS_FALSE(

        BinarySearchIf(instances_, 0, instances_.length(), cmp, &index));

    MOZ_ALWAYS_TRUE(instances_.insert(instances_.begin() + index, &instance));