**Description**
 Add the `addr`, `with_addr, `map_addr` methods to the `NonNull` type,
 and map the address type to `NonZeroUsize`.

 **Motiviation**
 The `NonNull` type is useful for implementing pointer types which have
 the 0-niche. It is currently possible to implement these provenance
 preserving functions by calling `NonNull::as_ptr` and `new_unchecked`.
 The addition of these methods simply make it more ergonomic to use.

 **Testing**
 Added a unit test of a nonnull tagged pointer type. This is based on
 some real code I have elsewhere, that currently routes the pointer
 through a `NonZeroUsize` and back out to produce a usable pointer.

Fixes issue  rust-lang#95533

Handle rustc_const_stable attribute in library feature collector

The library feature collector in [compiler/rustc_passes/src/lib_features.rs](https://github.com/rust-lang/rust/blob/551b4fa395fa588d91cbecfb0cdfe1baa02670cf/compiler/rustc_passes/src/lib_features.rs) has only been looking at `#[stable(…)]`, `#[unstable(…)]`, and `#[rustc_const_unstable(…)]` attributes, while ignoring `#[rustc_const_stable(…)]`. The consequences of this were:

- When any const feature got stabilized (changing one or more `rustc_const_unstable` to `rustc_const_stable`), users who had previously enabled that unstable feature using `#![feature(…)]` would get told "unknown feature", rather than rustc's nicer "the feature … has been stable since … and no longer requires an attribute to enable".

    This can be seen in the way that rust-lang#93957 (comment) failed after rebase:

    ```console
    error[E0635]: unknown feature `const_ptr_offset`
      --> $DIR/offset_from_ub.rs:1:35
       |
    LL | #![feature(const_ptr_offset_from, const_ptr_offset)]
       |                                   ^^^^^^^^^^^^^^^^
    ```

- We weren't enforcing that a particular feature is either stable everywhere or unstable everywhere, and that a feature that has been stabilized has the same stabilization version everywhere, both of which we enforce for the other stability attributes.

This PR updates the library feature collector to handle `rustc_const_stable`, and fixes places in the standard library and test suite where `rustc_const_stable` was being used in a way that does not meet the rules for a stability attribute.

invalid_value lint: detect invalid initialization of arrays

…-DPC

Improve TyCtxt::type_of documentation

r? `@oli-obk`

…iagnostic, r=tmiasko

Add error message suggestion for missing noreturn in naked function

I had to google the syntax for inline asm's `noreturn` option when I got this error earlier today, so I figured I'd save others the trouble and add the syntax/fix as a suggestion in the error.

Implement provenance preserving methods on NonNull

### Description
 Add the `addr`, `with_addr`, `map_addr` methods to the `NonNull` type, and map the address type to `NonZeroUsize`.

 ### Motivation
 The `NonNull` type is useful for implementing pointer types which have  the 0-niche. It is currently possible to implement these provenance  preserving functions by calling `NonNull::as_ptr` and `new_unchecked`. The adding these methods makes it more ergonomic.

 ### Testing
 Added a unit test of a non-null tagged pointer type. This is based on some real code I have elsewhere, that currently routes the pointer through a `NonZeroUsize` and back out to produce a usable pointer. I wanted to produce an ideal version of the same tagged pointer struct that preserved pointer provenance.

### Related

Extension of APIs proposed in rust-lang#95228 . I can also split this out into a separate tracking issue if that is better (though I may need some pointers on how to do that).

Fix `thread_local!` macro to be compatible with `no_implicit_prelude`

Fixes issue  rust-lang#95533.

small type system refactoring