Rollup merge of #146368 - ojeda:rfl, r=lqd

CI: rfl: move job forward to Linux v6.17-rc5 to remove temporary commits

v6.17-rc5 contains the equivalent of the two commits we had here, thus move the Rust for Linux job forward to that so that we don't need the temporary commits anymore.

r? ```@lqd``` ```@Kobzol```
try-job: x86_64-rust-for-linux
```@rustbot``` label A-rust-for-linux
```@bors``` try

Author: matthiaskrgr

src/ci/docker/scripts/rfl-build.sh

@@ -2,9 +2,7 @@
 
 set -euo pipefail
 
-# https://github.com/rust-lang/rust/pull/144443
-# https://github.com/rust-lang/rust/pull/145928
-LINUX_VERSION=8851e27d2cb947ea8bbbe8e812068f7bf5cbd00b
+LINUX_VERSION=v6.17-rc5
 
 # Build rustc, rustdoc, cargo, clippy-driver and rustfmt
 ../x.py build --stage 2 library rustdoc clippy rustfmt