Make sure to record deps from cached task in new solver on first run
We weren't actually performing a read of the dep node in `with_cached_task` in the new solver, which meant that all queries that computed a goal for the first time were just not recording the query dependencies that we call in that query.
In the incremental test, the typeck query for `fn poll` isn't being marked red even tho it's invalidated due to its writeback results changing. This happens b/c we normalize `Self::Error` into `Error`, which should call `type_of` which is a red query (since `ty::Adt` contains an `AdtDef`, and that `AdtDef`'s stable hash changes since it's ). However, since we weren't tracking deps in that normalize query, the typeck result was remaining green, and we were trying to decode a def id that no longer exists (the field that got removed).
r? lcnr
5a0a5e6db9