Fix the plugin state for async modules in webpack plugins (#62998)
### What
Use the plugin state directly in flight plugins to access the async
modules collection
### Why
This change is cherry-picked from #62349 , where I found the plugin
state didn't store the async modules reousces properly due to the clone
of the array in flight manifest plugin. So for flight manifestp plugin
itself, it's holding a different instance rather than the one from proxy
state.
Closes NEXT-2743