Auto merge of #108056 - matthiaskrgr:rollup-oa6bxvh, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - #107573 (Update the minimum external LLVM to 14)
 - #107626 (Fix `x fix` on the standard library itself)
 - #107673 (update ICU4X to 1.1.0)
 - #107733 (Store metrics from `metrics.json` to CI PGO timer)
 - #108007 (Use `is_str` instead of string kind comparison)
 - #108033 (add an unstable `#[rustc_coinductive]` attribute)
 - #108039 (Refactor refcounted structural_impls via functors)
 - #108040 (Use derive attributes for uninteresting traversals)
 - #108044 (interpret: rename Pointer::from_addr → from_addr_invalid)

Failed merges:

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

Author: bors