use funnel shift as fallback impl for rotating shifts

That lets us remove this gnarly implementation from Miri and const-eval.

However, `rotate_left`/`rotate_right` are stable as const fn, so to do this we have to `rustc_allow_const_fn_unstable` a bunch of const trait stuff. Is that a bad idea? Cc `@oli-obk` `@fee1-dead`

add larger test for `proc_macro` `FromStr` implementations

Currently, there are only few tests that check the output of `TokenStream::from_str` and `Literal::from_str` (which is somewhat understandable as the rustc implementation just delegates these calls to the parser). In preparation for both the standalone backend (rust-lang/rust#130856) which will probably need to reimplement this logic as well as for removing panics from these functions (rust-lang/rust#58736), this PR adds a test which shows the various messy ways of how these functions report errors and the return values for successful parses.
Followup PRs such as rust-lang/rust#147859 will change more and more of these "diagnostic + error"s into `LexErrors`.

The test structure with the extra module is used to allow reusing it later easily for the standalone backend.

Constify `ManuallyDrop::take`

Feature: `const_manually_drop_take`
Tracking issue: rust-lang/rust#148773

This PR constifies `ManuallyDrop::take`.

Constify `mem::take`

Feature: `const_default` (rust-lang/rust#143894)

Error if an autodiff user does not set lto=fat

Based on your feedback, I started to provide a nice error message for a lack of `lto=fat`, instead of us forcing it.

In a next step, we should replace  `RUSTFLAGS="-Zautodiff=Enable"` with another Cargo.toml setting, as discussed here: rust-lang/rust#147487 (comment)

As another improvement, we should also figure out why rlib builds do not properly obey the fat=lto setting.

```````@bjorn3```````

add note to `lines` docs about empty str behavior

This pull request adds a short note to the documentation for `str::lines` that describes the behavior of the resulting iterator when called on an empty string. I tripped over this a few days ago because I thought (incorrectly) that the iterator would return a single line with an empty string. I don't doubt that the actual behavior (return no lines) is the correct behavior, but in the absence of explicit documentation describing it, I came to the wrong conclusion about it and maybe others will too. If this is so obvious as to be not worth including, I'm happy to withdraw the pull request! Thanks for taking a look.

Run codegen tests on a 32-bit target in PR CI

wasm32-wasip1 is the wasm target used in test-various. So using it somewhere else seems like a good bet.

…youxu

Abi compatibility test cleanup

r? `@jieyouxu`

- moves `NonNull` (and some friends) into `minicore.rs` so it can be re-used.
- tests the abi compatibility of a couple more targets. It's useful to have a comprehensive overview of all ABIs that rust has some amount of support for, e.g. testing for c-variadic or guaranteed tail calls (cc rust-lang/rust#148748)

Tweak Motor OS linker preset, fix `remote-test-server` for Motor OS

Had to tweak linking options in target spec to make it work (see moturus/motor-os#46).

compiletest: Remove the "wasm32-bare" alias for `wasm32-unknown-unknown`

- Follow-up to rust-lang/rust#148969

This "wasm32-bare" alias, understood by compiletest's `//@ ignore-wasm32-bare` and `//@ only-wasm32-bare` directives, dates all the way back to the original introduction of the `wasm32-unknown-unknown` target in rust-lang/rust#45905.

But there is no compelling reason to use an alias instead of the full target name.

r? jieyouxu

Rollup of 11 pull requests

Successful merges:

 - rust-lang/rust#148505 (add larger test for `proc_macro` `FromStr` implementations)
 - rust-lang/rust#148752 (Constify `ManuallyDrop::take`)
 - rust-lang/rust#148757 (Constify `mem::take`)
 - rust-lang/rust#148855 (Error if an autodiff user does not set lto=fat)
 - rust-lang/rust#148912 (add note to `lines` docs about empty str behavior)
 - rust-lang/rust#148958 (Run codegen tests on a 32-bit target in PR CI)
 - rust-lang/rust#148994 (Abi compatibility test cleanup)
 - rust-lang/rust#148999 (Tweak Motor OS linker preset, fix `remote-test-server` for Motor OS)
 - rust-lang/rust#149004 (compiletest: Avoid race condition in file deletion)
 - rust-lang/rust#149008 (triagebot: remove jsha from notifications for rustdoc HTML)
 - rust-lang/rust#149010 (compiletest: Remove the "wasm32-bare" alias for `wasm32-unknown-unknown`)

r? `@ghost`
`@rustbot` modify labels: rollup

This updates the rust-version file to cc328c12382f05d8ddf6ffc8139deb7985270ad8.

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: cc328c12382f05d8ddf6ffc8139deb7985270ad8
Filtered ref: 3ac1147
Upstream diff: rust-lang/rust@69d4d5f...cc328c1

This merge was created using https://github.com/rust-lang/josh-sync.