[services] Fix clang paths

Summary:
https://linear.app/comm/issue/ENG-915/services-fix-clang-paths

Fixing clang paths that are broken because of the directory refactoring

Test Plan:

yarn clang-format-all

Reviewers: palys-swm, ashoat

Reviewed By: ashoat

Subscribers: ashoat, palys-swm, Adrian, atul, yayabosh

Differential Revision: https://phabricator.ashoat.com/D3873