Rollup merge of #57278 - mati865:config_clippy, r=alexcrichton
Rollup merge of #57278 - mati865:config_clippy, r=alexcrichton

Add Clippy to config.toml.example

Omitted in https://github.com/rust-lang/rust/pull/51122

The order is based on https://github.com/rust-lang/rust/blob/ec194646fef1a467073ad74b8b68f6f202cfce97/src/bootstrap/install.rs#L212

aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust