Auto merge of #64182 - Centril:rollup-fmohja1, r=Centril

Rollup of 5 pull requests

Successful merges:

 - #63676 (Use wasi crate for Core API)
 - #64094 (Improve searching in rustdoc and add tests)
 - #64111 (or-patterns: Uniformly use `PatKind::Or` in AST & Fix/Cleanup resolve)
 - #64156 (Assume non-git LLVM is fresh if the stamp file exists)
 - #64175 (Fix invalid span generation when it should be div)

Failed merges:

 - #63806 (Upgrade rand to 0.7)

r? @ghost