[beta 1.97] dont apply host-config gating to stable behavior#17211
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Captured behaviors are likely bugs introduced by rust-lang#17123 See also rust-lang/miri#5101
rust-lang#17123 made host artifacts stop picking up `target.'cfg(..)'.runner` and `target.'cfg(..)'.linker` even without `-Ztarget-applies-to-host -Zhost-config`. That silently changed stable behavior that `target.'cfg(..)'` no longer applied to proc-macro and build script compilation under `--target <host>`, while `target.<triple>` config still did. The old gate reused `host_artifact_uses_only_host_config`, which is for the documented rustflags dual behavior. It wasn't for runner and linker. This PR narrows the gate to `target-applies-to-host = false` and restore to pre PR 17123 stable behavior, while keeping `-Zhost-config` fix as it is still nightly.
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[beta-1.98] Update cargo 1 commits in 864064524a7205e670579b6873d9b18897437eaf..d33be5d17d90eeb98d6fa329b5d46b6587493ea2 2026-07-12 08:11:54 -0700 to 2026-07-14 07:38:28 -0500 - [beta 1.97] dont apply host-config gating to stable behavior (rust-lang/cargo#17211)
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[beta-1.98] Update cargo 1 commits in 864064524a7205e670579b6873d9b18897437eaf..d33be5d17d90eeb98d6fa329b5d46b6587493ea2 2026-07-12 08:11:54 -0700 to 2026-07-14 07:38:28 -0500 - [beta 1.97] dont apply host-config gating to stable behavior (rust-lang/cargo#17211)
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[beta-1.98] Update cargo 1 commits in 864064524a7205e670579b6873d9b18897437eaf..d33be5d17d90eeb98d6fa329b5d46b6587493ea2 2026-07-12 08:11:54 -0700 to 2026-07-14 07:38:28 -0500 - [beta 1.97] dont apply host-config gating to stable behavior (rust-lang/cargo#17211)
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In order to make CI pass, the following PRs are also cherry-picked: