Auto merge of #122709 - onur-ozkan:use-precompiled-rustc-by-default, r=Mark-Simulacrum

use precompiled rustc for non-dist builders

Makes non-dist builders to use precompiled CI rustc by default if they are available for the target triple.

As we are going to make `rust.download-rustc=if-unchanged` default option with https://github.com/rust-lang/rust/pull/119899, we need to make sure `if-unchanged` logic never breaks and works as expected.

As an addition, this will significantly improve the build times on CI when there's no change on the compiler.

blocker for #119899

try-job: x86_64-gnu-nopt
try-job: aarch64-apple
This commit is contained in:
bors 2024-10-08 18:12:22 +00:00
commit c54c798a08

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