Fixes rust-lang#120553
Fixes rust-lang#48462

Currently, if you attempt to run ui tests in a vendored build, you will
see this failure

```
---- [ui] tests/ui/issues/issue-21763.rs stdout ----
diff of stderr:

8          = note: required because it appears within the type `(Rc<()>, Rc<()>)`
9          = note: required for `hashbrown::raw::RawTable<(Rc<()>, Rc<()>)>` to implement `Send`
10      note: required because it appears within the type `hashbrown::map::HashMap<Rc<()>, Rc<()>, RandomState>`
-         --> $HASHBROWN_SRC_LOCATION
+         --> /rust/deps/hashbrown/src/map.rs:190:12
12      note: required because it appears within the type `HashMap<Rc<()>, Rc<()>>`
13        --> $SRC_DIR/std/src/collections/hash/map.rs:LL:COL
14      note: required by a bound in `foo`
```

This happend because the code that attempts to remap
`HASHBROWN_SRC_LOCATION` expects it to be under `hashbrown-$version`,
which is the case in a normal cargo registry, but not when vendor, where
by default crates may not have the version in their directory name.

This change passes `--versioned-dirs` to `cargo vendor` to enforce that
every crate includes the version in the subdir name, which fixes the ui
test and brings `--enable-vendor` builds closer to normal ones.

In user-facing Rust, `dyn` always has at least one predicate following
it. Unfortunately, because we filter out marker traits from receivers at
callsites and `dyn Sync` is, for example, legal, this results in us
having `dyn` types with no predicates on occasion in our alias set
encoding. This patch handles cases where there are no predicates in a
`dyn` type which are relevant to its alias set.

Fixes rust-lang#122998

…spans.

This makes `-Zprint-type-sizes`'s output easier to read, because the
name of an `async fn` is more immediately recognizable than its span.

I also deleted the comment "FIXME(eddyb) should use `def_span`." because
it appears to have already been fixed by commit 67727aa.

…lacrum

Add rust-lldb pretty printing for Path and PathBuf

Fixes rust-lang#120553
Fixes rust-lang#48462

…onur-ozkan

Introduce infrastructure for generating target docs

See rust-lang#120745

It's highly unlikely that the format is optimal, but it's okay at least and can always be improved. Mostly posting this to get something working so we can continue.

Use `TARGET_CHECK_ONLY=0` to actually build the book instead of just checking the new docs.

r? ``@davidtwco``

…nur-ozkan

fix(bootstrap/dist): use versioned dirs when vendoring

Currently, if you attempt to run ui tests in a vendored build, you will
see this failure

```
---- [ui] tests/ui/issues/issue-21763.rs stdout ----
diff of stderr:

8          = note: required because it appears within the type `(Rc<()>, Rc<()>)`
9          = note: required for `hashbrown::raw::RawTable<(Rc<()>, Rc<()>)>` to implement `Send`
10      note: required because it appears within the type `hashbrown::map::HashMap<Rc<()>, Rc<()>, RandomState>`
-         --> $HASHBROWN_SRC_LOCATION
+         --> /rust/deps/hashbrown/src/map.rs:190:12
12      note: required because it appears within the type `HashMap<Rc<()>, Rc<()>>`
13        --> $SRC_DIR/std/src/collections/hash/map.rs:LL:COL
14      note: required by a bound in `foo`
```

This happens because the code that attempts to remap
`HASHBROWN_SRC_LOCATION` expects it to be under `hashbrown-$version`,
which is the case in a normal cargo registry, but not when vendoring, where
by default crates may not have the version in their directory name.

This change passes `--versioned-dirs` to `cargo vendor` to enforce that
every crate includes the version in the subdir name, which fixes the ui
test and brings `--enable-vendor` builds closer to normal ones.

Update stdarch submodule

r? `@Amanieu`

…-errors

In `pretty_print_type()`, print `async fn` futures' paths instead of spans.

This makes `-Zprint-type-sizes`'s output easier to read, because the name of an `async fn` is more immediately recognizable than its span. This change will also synergize with my other `-Zprint-type-sizes` PR rust-lang#122922 which prints the type of child futures being awaited.

I also deleted the comment "FIXME(eddyb) should use `def_span`." because it appears to have already been fixed by commit 67727aa.

…acrum

Use `chunk_by` when building `ReverseSccGraph`

With stable `chunk_by` in Rust 1.77, this code doesn't need `Itertools::group_by` anymore.

CFI: Handle dyn with no principal

In user-facing Rust, `dyn` always has at least one predicate following it. Unfortunately, because we filter out marker traits from receivers at callsites and `dyn Sync` is, for example, legal, this results in us having `dyn` types with no predicates on occasion in our alias set encoding. This patch handles cases where there are no predicates in a `dyn` type which are relevant to its alias set.

Fixes rust-lang#122998

r? workingjubilee