message: Bump ORCA version to 3.51.0
  This includes performance improvements for constraint derivation.
diff: @@ -5,7 +5,7 @@ project(gpopt LANGUAGES CXX C)
  set(CMAKE_CXX_STANDARD 98)
  set(GPORCA_VERSION_MAJOR 3)
  -set(GPORCA_VERSION_MINOR 50)
  +set(GPORCA_VERSION_MINOR 51)
  set(GPORCA_VERSION_PATCH 0)
  set(GPORCA_VERSION_STRING "${GPORCA_VERSION_MAJOR}.${GPORCA_VERSION_MINOR}.${GPORCA_VERSION_PATCH}")
  