This changes #22093 by making the change only have an effect for the
supported provider: Zeta.
Made the change because the UX is still experimental and I don't want to
break existing workflows for Copilot/Supermaven users.
Even Zeta users can opt-out of it by setting
`"show_inline_completions_in_menu": false` in their settings, in case
they want the old show-inline-completion-or-show-lsp-completion behavior
back.
Release Notes:
- N/A
6192c83f23