Rollup merge of #69563 - andre-richter:fix_no_std_match, r=Mark-Simulacrum

Rollup merge of #69563 - andre-richter:fix_no_std_match, r=Mark-Simulacrum

Fix no_std detection for target triples

The current check for wether a target is no_std or not is matching for the string `-none-` in a target triple. This doesn't work for triples that end in `-none`, like `aarch64-unknown-none`.

Fix this by matching for `-none` instead.

I checked for all the current target triples containing `none`, and this should not generate any false positives.

This fixes an issue encountered in https://github.com/rust-lang/rust/pull/68334