[Chore] Lint services/lib/cmake-components/grpc.cmake

Summary: Lint cmake helper file

Test Plan:

nix develop
cmake-lint services/backup/CMakeLists.txt

Depends on D4564

Reviewers: atul, varun, max, karol

Reviewed By: atul

Subscribers: ashoat, tomek, adrian, abosh

Differential Revision: https://phab.comm.dev/D4569