Split config database setup by platform

Add basic database setup for AWS, GCP although these are not yet used
by the setup code but will be useful later.

Currently each is gated by `mobyplatform` but this can be removed once we
construct Moby per platform, and once these are containerised so they
are not run from `openrc`.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

alpine/packages/windowsnet/etc/init.d/windowsnet

@@ -3,6 +3,7 @@
 description="Configuring Windows network settings from database."
 
 depend() {
+	need database-windows
 	before sysctl net
 }