fix(models): Unpack BitNet packed weights to fix CI failure (#43721)
* fix: Unpack packed weights in quantizer post-loading hook (AutoBitLinear)
* nit: Fix ci/circleci: check_code_quality
* fix: Simply unpack BitNet weights during loading itself
* fix: Address comments
* review: Add tests
* nit: Change the import
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Co-authored-by: Mohamed Mekkouri <93391238+MekkCyber@users.noreply.github.com>