Enable lifetime tethering of the AP by default

After this change, the AssetProcessor process will be torn down by
default after its parent process shuts down (if it was spawned by a
parent process).

Signed-off-by: Jeremy Ong <jcong@amazon.com>

Code/Framework/AzFramework/Platform/Windows/AzFramework/Asset/AssetSystemComponentHelper_Windows.cpp

@@ -14,7 +14,7 @@
 
 #include <Psapi.h>
 
-AZ_CVAR(bool, ap_tether_lifetime, false, nullptr, AZ::ConsoleFunctorFlags::Null,
+AZ_CVAR(bool, ap_tether_lifetime, true, nullptr, AZ::ConsoleFunctorFlags::Null,
     "If enabled, a parent process that launches the AP will terminate the AP on exit");
 
 namespace AzFramework::AssetSystem::Platform