Summary: as discussed, we no longer want a separate autocomplete service. instead, we will be handling autocomplete in the API service. however, we will still pull out the autocomplete logic in a separate module (the old autocomplete folder we had before).

Test Plan: n/a

Reviewers: zasgar, #engineering

Reviewed By: zasgar, #engineering

Differential Revision: https://phab.corp.pixielabs.ai/D4214

GitOrigin-RevId: a89d0143e8889e995d8ecc1e4559a0fa92c1e4ab