Rollup merge of #133055 - kpreid:clone-uninit-doc, r=Mark-Simulacrum

Expand `CloneToUninit` documentation.

* Clarify relationship to `dyn` after #133003.
* Add an example of using it with `dyn` as #133003 enabled.
* Replace parameter name `dst` with `dest` to avoid confusion between abbreviations for “DeSTination” and “Dynamically-Sized Type”.
* Add an example of implementing it.
* Add links to Rust Reference for the mentioned concepts.
* Mention that its method should rarely be called.
* Various small corrections.

Please review the `unsafe` code closely, as I am not an expert in the best possible ways to express these operations. (It might also be better to omit the implementation example entirely.)

cc `@zachs18` #126799

0 files changed, 0 insertions, 0 deletions