Port of the upstream vLLM change #58863 (Apache-2.0). One check read use_gdn_recoverssm directly; it now uses getattr with a False
default like its neighbours, so layers built without __init__ in tests work.
Co-Authored-By: Hinata <hinata@idihore.id>
Signed-off-by: MOVZX <movzx@yahoo.com>