[CMake][Release] Statically link ZSTD on all OSes (llvm#128554)

This will make the binaries more portable.

(cherry picked from commit 0983277)

Author: tstellar

clang/cmake/caches/Release.cmake

@@ -143,6 +143,4 @@ endif()
 set_final_stage_var(CPACK_GENERATOR "TXZ" STRING)
 set_final_stage_var(CPACK_ARCHIVE_THREADS "0" STRING)
 
-if(${CMAKE_HOST_SYSTEM_NAME} MATCHES "Darwin")
-  set_final_stage_var(LLVM_USE_STATIC_ZSTD "ON" BOOL)
-endif()
+set_final_stage_var(LLVM_USE_STATIC_ZSTD "ON" BOOL)