ci: aarch64-gnu: Stop skipping panic_abort_doc_tests

The skipped test passes since nightly-2024-11-29. Let's stop skipping
it to increase the chance of detecing a regression.

Author: Enselic

src/ci/docker/host-aarch64/aarch64-gnu/Dockerfile

@@ -26,6 +26,5 @@ ENV RUST_CONFIGURE_ARGS \
  --enable-sanitizers \
  --enable-profiler \
  --enable-compiler-docs
-# FIXME: Skipping cargo panic_abort_doc_tests due to https://github.com/rust-lang/rust/issues/123733
 ENV SCRIPT python3 ../x.py --stage 2 test && \
-  python3 ../x.py --stage 2 test src/tools/cargo --test-args \"--skip panic_abort_doc_tests\"
+  python3 ../x.py --stage 2 test src/tools/cargo