fix: ensure child routes receive context returned from parent routes' beforeLoad functions, even if invalidate() is called during another load#4306

jamesknelson wants to merge 2 commits intoTanStack:mainTanStack/router:mainfrom

jamesknelson:avoid-double-load-on-invalidatejamesknelson/tanstack-router-patch:avoid-double-load-on-invalidateCopy head branch name to clipboard