Rollup merge of #41450 - rillian:rustc-wrapper, r=alexcrichton
Rollup merge of #41450 - rillian:rustc-wrapper, r=alexcrichton

Update cargo for 1.18.0.

Bump our associated cargo to pick up the RUSTC_WRAPPER feature
for use with build caches.

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