Auto merge of #114611 - nnethercote:type-system-chess, r=compiler-errors

Speed up compilation of `type-system-chess`

[`type-system-chess`](rust-lang/rustc-perf#1680) is an unusual program that implements a compile-time chess position solver in the trait system(!)  This PR is about making it compile faster.

r? `@ghost`

Author: bors