build(cmake): update policies (#3775)

cmake/dependencies/nlohmann_json.cmake

@@ -8,6 +8,13 @@ if(NOT nlohmann_json_FOUND)
     message(STATUS "nlohmann_json v3.11.x package not found in the system. Falling back to FetchContent.")
     include(FetchContent)
 
+    if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0")
+        cmake_policy(SET CMP0135 NEW)  # Avoid warning about DOWNLOAD_EXTRACT_TIMESTAMP in CMake 3.24
+    endif()
+    if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.31.0")
+        cmake_policy(SET CMP0174 NEW)  # Handle empty variables
+    endif()
+
     FetchContent_Declare(
             json
             URL      https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz