[ELF] Enhance --no-allow-shlib-undefined for non-exported definitions

For a DSO with all DT_NEEDED entries accounted for, if it contains an
undefined non-weak symbol that shares a name with a non-exported
definition (hidden visibility or localized by a version script), and
there is no DSO definition, we should report an error.

#70769 implemented the error when we see `ref.so def-hidden.so`. This patch
implementes the error when we see `def-hidden.so ref.so`, matching GNU
ld.

Close #86777