[dynamicIO] Track module loading in dev always (#81388)
In dev we prerender and render concurrently. The former to validate
dynamicIO rules. The latter to stream a response as soon as possible. If
we only track module loading during prerenders it is possible to kick
off loading a chunk during the render and then not observe that chunk
load during prerender, leading to an early abort before all modules have
had a chance to load.
To solve this we simply always track module loading in dev.
