Use Module.GetProperties() instead of ModuleBase.generalProperties

ModuleBase.generalProperties served the pupose of being a subset
of ModuleBase.customizableProperties. But now with the removal of
the latter, the former is simply a redirection to Module.GetProperties()

Bug: 206961391
Test: m nothing and diff the ninja files
Change-Id: I6dd8b7ba74eb5e7ffb61029b0f9129eec2ccfdaf