Add full broadcasting support to LayerNormalization and RMSNormalization#26613

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naomiOvad wants to merge 5 commits intomicrosoft:mainfrom

naomiOvad:fix/rmsnorm-broadcast-26432

Commits on Nov 6, 2025

WIP: partial work on rmsnorm tests
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Commits on Nov 19, 2025

Fix RMSNormalization & LayerNormalization broadcast handling and add comprehensive tests
naomiOvad
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Update LayerNorm tests to run on CPU only
naomiOvad
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Commits on Nov 20, 2025

LayerNorm: unify generic implementation, add mixed-broadcast test, and improve input validation
naomiOvad
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Commits on Nov 25, 2025

Added rank check, renamed sc_/bi_, and added a test for invalid Scale/Bias rank.
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