[ET-VK] Implement linear_q4gsw #14046
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/14046
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Pull Request resolved: #14020 As title. Extend the quantized linear implementation to be able to handle 4-bit per group symmetrically quantized weights. This is in preparation to support using the int8 dot product extension to be able to handle dynamically quantized inputs. ghstack-source-id: 308092879 @exported-using-ghexport Differential Revision: [D81800023](https://our.internmc.facebook.com/intern/diff/D81800023/)
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This PR was created by the merge bot to help merge the original PR into the main branch.
ghstack PR number: #14020 by @SS-JIA
^ Please use this as the source of truth for the PR details, comments, and reviews
ghstack PR base: https://github.com/pytorch/executorch/tree/gh/SS-JIA/321/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/321/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/gh/SS-JIA/320/orig
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/321/orig
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