[llvm] [CMake] Enable new policy for CMAKE_MSVC_DEBUG_INFORMATION_FORMAT (PR #82371)

[Dave Abrahams via llvm-commits]

================
@@ -10,3 +10,15 @@ endif()
 if(POLICY CMP0116)
   cmake_policy(SET CMP0116 OLD)
 endif()
+
++# Enable debug info compatible with SCCache
+# MSVC debug information format flags are selected by an
+# abstraction. New in CMake 3.25.
----------------
dabrahams wrote:

```suggestion
# MSVC debug information format flags are selected via
# CMAKE_MSVC_DEBUG_INFORMATION_FORMAT, instead of
# embedding flags in e.g. CMAKE_CXX_FLAGS_RELEASE.
# New in CMake 3.25.
```

https://github.com/llvm/llvm-project/pull/82371