…string constant

This symbol should be provided by Hermit.

…homcc

reword descriptions of the deprecated int modules

Based on recommendation by `@est31` here: rust-lang#107587 (comment)

This is meant to make it more clear, when looking at the `std` or `core` docs, that these are deprecated modules - not deprecated integer types (a common misunderstanding).

Before:
![image](https://user-images.githubusercontent.com/803701/216733011-fabc22e1-4e77-4a47-96e3-a765ac4690b6.png)

After:
![image](https://user-images.githubusercontent.com/803701/216733660-02071ced-883d-4ab5-8c0a-d28547d1d5db.png)

…Simulacrum

Add `array::map` benchmarks

Since there were no previous benchmarks for `array::map`, and it is known to have mediocre/poor performance, add some simple benchmarks. These benchmarks vary the length of the array and size of each item.

…-Simulacrum

Avoid copy-pasting the `ilog` panic string in a bunch of places

I also ended up changing the implementations to `if let` because it doesn't work to
```rust
self.checked_ilog2().unwrap_or_else(panic_for_nonpositive_argument)
```
due to the `!`.  But as a bonus that meant I could remove the `rustc_allow_const_fn_unstable` too.

…ulacrum

Add a doc note about why `Chain` is not `ExactSizeIterator`

Inspired by <https://rust-lang.zulipchat.com/#narrow/stream/122651-general/topic/Why.20isn't.20Chain.3CA.2C.20B.3E.20an.20ExactSizeIterator.3F/near/327395874>.

…est, r=notriddle

Update browser-ui-test version to 0.14.3

It brings a few fixes to the `NEAR` checks. The PR for it in [here](GuillaumeGomez/browser-UI-test#436).

r? `@notriddle`

Hermit: Remove floor symbol

This symbol should be provided by Hermit.

It was introduced in 2019 (rust-lang#65167). Since 2020, Hermit provides these math functions on its own (hermit-os/hermit-rs#37). I think moving this to Hermit was merely an oversight.

Related:
* hermit-os/kernel#654
* hermit-os/hermit-rs#406

CC: `@stlankes`

…ngjubilee

Fix unintentional UB in SIMD tests

r? `@workingjubilee`