[CMake] Add cache for enabling sccache builds

Add cmake cache for enabling sccache while building with the new runtime
build when sccache is available.

To build with sccache, pass the `sccache.cmake`

```
cmake \
  -B build \
  -S Runtime/Core \
  -C Runtimes/Core/cmake/cache/sccache.cmake
```

Author: etcwilde

Runtimes/Core/cmake/caches/sccache.cmake

@@ -0,0 +1,7 @@
+find_program(SCCACHE_EXECUTABLE sccache)
+
+if(SCCACHE_EXECUTABLE)
+  set(CMAKE_C_COMPILER_LAUNCHER "${SCCACHE_EXECUTABLE}" CACHE FILEPATH "")
+  set(CMAKE_CXX_COMPILER_LAUNCHER "${SCCACHE_EXECUTABLE}" CACHE FILEPATH "")
+  message(STATUS "sccache enabled")
+endif()