ggml : set output of view src (#25729)

ggml : set output of view src (#25729)

* llama-graph: set_outputs to t->view_src

* change set_output to GGML_ASSERT about views not being outputs

* sampler : avoid views in outputs

* cont : fix dist sampler

* cont : consistent logits handling

* ggml : set output of view src

* graph : simplify set_outputs()

* cont : cleanup

Co-authored-by: Gaurav Garg <redacted>
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Co-authored-by: Georgi Gerganov <redacted>
Co-authored-by: Gaurav Garg <redacted>