The gcc-11.4.1-4.el9_4 build switch to the GCC-built annobin plugin. This brought back RHEL-21772 because the annobin spec file installs the unpatched sources for later use by GCC:

# Also install a copy of the sources into the build tree.
mkdir -p                            %{buildroot}%{annobin_source_dir}
cp %{_sourcedir}/%{annobin_sources} %{buildroot}%{annobin_source_dir}/latest-annobin.tar.xz
%endif

This blocks glibc rebuilds (exactly the same symptoms as RHEL-21772) and could result in other packages getting misbuilt, too.

Fixing this in the annobin package is sufficient, there's no need to rebuild GCC. A simple rebuild of annobin itself will result in the patched sources being used, but it's not a long-term fix of the underlying issue.