Nanopb breaks build when CMake files are removed

[a-stickan]

Description

Manually removing the CMake build files with rm -rf build install log is a good way to verify things build on a clean system and troubleshoot CMake errors. However, it breaks nanopb in ways that I cannot figure out how to easily resolve without a fresh reinstall.

Steps To Reproduce

1. colcon build
2. rm -rf build install log
3. colcon build

Result: CMake build error hell

• This bug has been reproduced by someone else

Expected behavior

CMake build files can be cleared without major issues