google-cloud-cpp: 0.11.0 -> 0.14.0

This bumps google-cloud-cpp to 0.14.0, which switched to using pkgconfig
for more of the dependencies. On top of that, the installation looks
much better (we don't need to fixup library paths and move files around)

On top of that, upstream introduced another intermediate dependency
(googleapis-cpp-cmakefiles).

Obsoletes #67769.