Auto merge of #105462 - oli-obk:feeding_full, r=cjgillot,petrochenkov

give the resolver access to TyCtxt

The resolver is now created after TyCtxt is created. Then macro expansion and name resolution are run and the results fed into queries just like before this PR.

Since the resolver had (before this PR) mutable access to the `CStore` and the source span table, these two datastructures are now behind a `RwLock`. To ensure that these are not mutated anymore after the resolver is done, a read lock to them is leaked right after the resolver finishes.

### PRs split out of this one and leading up to it:

* rust-lang/rust#105423
* rust-lang/rust#105357
* rust-lang/rust#105603
* rust-lang/rust#106776
* rust-lang/rust#106810
* rust-lang/rust#106812
* rust-lang/rust#108032

Author: bors