feat(git)!: ask for confirmation in `gpf` alias (#10169)

- Rename `git push --force-with-lease ...` to `gpff`
- Add a y/n confirmation prompt to `gpf` before running `git push --force-with-lease ...`

BREAKING CHANGE: this change adds a confirmation prompt to the `gpf` alias before
running the potentially destructive `git push --force-with-lease` command. If you
want to force-run the command without having to confirm it, run `gpff`.