Rollup merge of #81588 - xfix:delete-doc-alias, r=Mark-Simulacrum

Rollup merge of #81588 - xfix:delete-doc-alias, r=Mark-Simulacrum

Add doc aliases for "delete"

This patch adds doc aliases for "delete". The added aliases are supposed to reference usages `delete` in other programming languages.

- `HashMap::remove`, `BTreeMap::remove` -> `Map#delete` and `delete` keyword in JavaScript.

- `HashSet::remove`, `BTreeSet::remove` -> `Set#delete` in JavaScript.

- `mem::drop` -> `delete` keyword in C++.

- `fs::remove_file`, `fs::remove_dir`, `fs::remove_dir_all`-> `File#delete` in Java, `File#delete` and `Dir#delete` in Ruby.

Before this change, searching for "delete" in documentation returned no results.