bypass linker configuration and cross target check on x check

[onur-ozkan]

I was going to handle this using the untracked env approach, but I realized it somehow doesn't regress #130108 anymore...

Anyway, if it works, it works. 😄 No need to dig deeper but my guess is we moved some cache-invalidating env from these functions to others.

Fixes #133840

[rustbot]

r? @clubby789

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[onur-ozkan]

Rerolling due to inactivity. r? bootstrap

[clubby789]

🥲 Sorry, I typed out an r=me when green but guess I forgot to hit comment

@bors r+ rollup

[bors]

📌 Commit 7669d50 has been approved by clubby789

It is now in the queue for this repository.

[jieyouxu]

Failed in rollup on aarch64-apple:

2025-05-04T14:02:40.9144850Z failures:
2025-05-04T14:02:40.9145110Z 
2025-05-04T14:02:40.9145350Z ---- utils::cc_detect::tests::test_find stdout ----
2025-05-04T14:02:40.9145610Z 
2025-05-04T14:02:40.9145950Z thread 'utils::cc_detect::tests::test_find' panicked at src/bootstrap/src/utils/cc_detect/tests.rs:272:9:
2025-05-04T14:02:40.9146440Z CC not set for target x86_64-unknown-linux-gnu
2025-05-04T14:02:40.9146660Z 
2025-05-04T14:02:40.9146660Z 
2025-05-04T14:02:40.9146790Z failures:
2025-05-04T14:02:40.9147090Z     utils::cc_detect::tests::test_find

@bors r-

[clubby789]

This:

rust/src/bootstrap/src/utils/cc_detect/tests.rs

Line 265 in 62c5f58

let mut build = Build::new(Config { ..Config::parse(Flags::parse(&["check".to_owned()])) });

and other instances may need to be changed to "build" now?