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d7e7fbdcff
This adds an optimized helper for the common generate_tuple pattern:
generate_tuple([](auto i) { return Sequence<i.value>{}; }, N)
The new generate_identity_sequences<N>() function creates
Tuple<Sequence<0>, Sequence<1>, ..., Sequence<N-1>> without
requiring lambda instantiation at each call site.
Updated 21 call sites across threadwise_tensor_slice_transfer,
wrapper utilities, and layout files to use the new helper.
Build time improvement: ~1.1% wall-clock (18.3s -> 18.1s)