Add iterable streamer to multinomial sample #1660

Job	Run time
cpp-multinomial-greedy_causal_lm-ubuntu	8m 4s
cpp-beam_search_causal_lm-ubuntu (./build/samples/cpp/beam_search_causal_lm/beam_search_causal_lm)	11m 35s
cpp-beam_search_causal_lm-ubuntu (python ./samples/python/beam_search_causal_lm/beam_search_causa...	11m 30s
cpp-beam_search_causal_lm-notus-7b-v1	9m 18s
cpp-beam_search_causal_lm-Qwen1_5-7B-Chat	9m 47s
cpp-beam_search_causal_lm-Phi-2	8m 42s
cpp-beam_search_causal_lm-Qwen-7B-Chat	11m 10s
cpp-continuous-batching-macos	17m 43s
cpp-chat_sample-ubuntu	10m 40s
cpp-continuous-batching-ubuntu	12m 10s
cpp-continuous-batching-windows	18m 23s
cpp-greedy_causal_lm-redpajama-3b-chat	13m 15s
cpp-greedy_causal_lm-windows	20m 43s
cpp-Phi-1_5	7m 31s
cpp-speculative_decoding_lm-ubuntu	11m 36s
cpp-prompt_lookup_decoding_lm-ubuntu	8m 44s
	3h 10m 51s

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