Auto merge of #116983 - Urgau:prepare-bootstrap-for-new-check-cfg, r=Kobzol

Prepare the `bootstrap` tool for the new check-cfg syntax

This PR prepare the `bootstrap` tool for the [new check-cfg syntax](https://github.com/rust-lang/rust/pull/111072) as well as the according [changes to Cargo](https://github.com/rust-lang/cargo/pull/12845).

~~Note that while the new syntax can technically available on stage > 2, we actually cannot use it since we need a cargo version that supports the new syntax which won't happen until the next beta bump (if I understand everything correctly).~~

r? bootstrap
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bors 2023-10-26 08:54:42 +00:00
commit f19b1901ed

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