Rename "topic: not user facing" (#10828)

This PR was created by the merge bot to help merge the original PR into
the main branch.
ghstack PR number: https://github.com/pytorch/executorch/pull/10791 by
@jackzhxng
^ Please use this as the source of truth for the PR details, comments,
and reviews
ghstack PR base:
https://github.com/pytorch/executorch/tree/gh/jackzhxng/6/base
ghstack PR head:
https://github.com/pytorch/executorch/tree/gh/jackzhxng/6/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/main
Merge bot PR head:
https://github.com/pytorch/executorch/tree/gh/jackzhxng/6/orig
@diff-train-skip-merge

Co-authored-by: Jack Zhang <32371937+jackzhxng@users.noreply.github.com>