[FR]: Remove Language C dependency on cmakes.

### Does the feature exist in the most recent commit?

I noticed the CMake imposes this in projects that use googletest and compile it as part of their build process.

I am talking specifically about `CMakeLists.txt` in `googletest` and `googlemock`
lines `50` and `40` respectively:

```
project(gtest/mock VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
```

I have tried to edit the cmake, and remove the C language and it seems working, but I am not so familiar with code base of gtest if it is still required.

I tried to go the old method of compiling it separately and linking it. however that is significantly more complex than fetching it from the repo. Unfortunately `set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)` didn't work either.

### Why do we need this feature?

It would make it easier to integrate it using cmake.

### Describe the proposal.

remove the C from languages in project setup in cmake.

### Is the feature specific to an operating system, compiler, or build system version?

I have been using windows (msvc and ninja). Unfortunately I don't know the impact of this on other platforms.

Start with CMakeLists.txt in googletest and googlemock at the project declarations around lines 50 and 40. Read how the C and CXX languages are used in those build files, then validate the proposed change with a Windows MSVC and Ninja CMake integration. Done means projects can integrate googletest without the unnecessary C language dependency.

Written by the indexing model from the issue text.