Some refactors (!140156) require adding a few more batches, but we're already at the limit for how many we can add. This commit makes the batch flag into a 64 bit integer. It might be worth refactoring this more to use some system besides a flag, but for now this simple change is best. The atomic combination of requests wasn't actually required and isn't supported for 64 bit integers, so it's just removed here. Pull Request: https://projects.blender.org/blender/blender/pulls/140164