Suppress a CMake Warning (#21147)

* Suppress a CMake Warning

This change adds a local cmake_policy rule to suppress
warnings about libraries with unicode names.

```
CMake Warning (dev) at tests/src/Interop/PInvoke/DllImportPath/CMakeLists.txt:14 (add_library):
  Policy CMP0037 is not set: Target names should not be reserved and should
  match a validity pattern.  Run "cmake --help-policy CMP0037" for policy
  details.  Use the cmake_policy command to set the policy and suppress this
  warning.

  The target name "DllImportPath_U�n�i�c�o�d�e" is reserved or
  not valid for certain CMake features, such as generator expressions, and
  may result in undefined behavior.
This warning is for project developers.  Use -Wno-dev to suppress it.
```

* Update tests/src/Interop/PInvoke/DllImportPath/CMakeLists.txt

Co-Authored-By: swaroop-sridhar <Swaroop.Sridhar@microsoft.com>

0 files changed, 0 insertions, 0 deletions