Auto merge of rust-lang#112049 - Kobzol:pgo-omit-benchmarks, r=<try>

[do not merge] CI experiments

Various CI experiments for try/dist builds.

r? `@ghost`

src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile

@@ -92,11 +92,7 @@ ENV RUST_CONFIGURE_ARGS \
       --set rust.codegen-units=1
 
 # Note that `rust.debug` is set to true *only* for `opt-dist`
-ENV SCRIPT python3 ../x.py build --set rust.debug=true opt-dist && \
-    ./build/$HOSTS/stage0-tools-bin/opt-dist linux-ci -- python3 ../x.py dist \
-    --host $HOSTS --target $HOSTS \
-    --include-default-paths \
-    build-manifest bootstrap
+ENV SCRIPT python3 ../x.py build gcc
 ENV CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=clang
 
 # This is the only builder which will create source tarballs