Introduce files in "services/lib/src" to clang formatter

Summary: This differential enables files in "services/lib/src" to be formatted with clang formatter.

Test Plan: Before applying this differential put some not formatted C++ code in ServerBidiReactorBase.h and run yarn clang-format-all. Code will not be formatted. Remove changes, apply diff and repeat process. Code will be formatted now.

Reviewers: tomek, jon, max, ashoat

Reviewed By: ashoat

Subscribers: ashoat, atul, abosh

Differential Revision: https://phab.comm.dev/D5366