Keeps the token embedding table in pinned host memory behind a UVA view for the
stage-0 target and the last-stage MTP drafter, freeing GPU memory for KV. TP
sharding, masking and the all-reduce are retained. The knob is registered as a
compile-cache factor.
Co-Authored-By: Hinata <hinata@idihore.id>
Signed-off-by: MOVZX <movzx@yahoo.com>