cmake: Set process code page to UTF-8 on Windows

Additionally, this change adds app manifests to targets that were
previously missing them.

src/qt/test/CMakeLists.txt

@@ -14,6 +14,8 @@ add_executable(test_bitcoin-qt
   ../../init/bitcoin-qt.cpp
 )
 
+add_windows_application_manifest(test_bitcoin-qt)
+
 target_link_libraries(test_bitcoin-qt
   core_interface
   bitcoinqt