Paramatized rust_static_library to enable CXX support (#2092)

Summary:
X-link: https://github.com/facebookincubator/delos_core/pull/8

X-link: https://github.com/facebookincubator/zstrong/pull/610

X-link: https://github.com/facebookincubator/crux/pull/10

X-link: https://github.com/facebookexternal/traffixr/pull/3

X-link: https://github.com/facebookincubator/katran/pull/205

X-link: https://github.com/facebookincubator/fizz/pull/101

X-link: https://github.com/facebook/sapling/pull/763

X-link: https://github.com/facebookexperimental/rust-shed/pull/43

X-link: https://github.com/facebook/wangle/pull/221

X-link: https://github.com/facebook/openr/pull/150

X-link: https://github.com/facebook/hhvm/pull/9403


X-link: https://github.com/facebook/fb303/pull/42

X-link: https://github.com/facebookincubator/velox/pull/7301

We are now using CXX (and not just bindgen/cbindgen) for building our Rust C/C++ APIS, but our OSS tooling did not ergomically support this. This change adds a single option, `USE_CXX_INCLUDE`, to the CMake function, `rust_static_library`, to enable adding the `cxxbridge` path to the include path.

Reviewed By: xavierd

Differential Revision: D50772544