Add a choice of how to end streaming from callback: STOP or CANCEL (#… #54

Job	Run time
cpp-beam_search_causal_lm-notus-7b-v1	1s
cpp-beam_search_causal_lm-Phi-2	1s
cpp-beam_search_causal_lm-Qwen1_5-7B-Chat	1s
cpp-beam_search_causal_lm-ubuntu (./build/samples/cpp/text_generation/beam_search_causal_lm)	21m 39s
cpp-chat_sample-ubuntu	14m 26s
cpp-beam_search_causal_lm-ubuntu (python ./samples/python/text_generation/beam_search_causal_lm.py)	21m 4s
cpp-greedy_causal_lm-Qwen-7B-Chat	1s
cpp-greedy_causal_lm-redpajama-3b-chat	1s
cpp-greedy_causal_lm-windows	27m 16s
cpp-multinomial-greedy_causal_lm-ubuntu	1s
cpp-Phi-1_5	1s
cpp-prompt_lookup_decoding_lm-ubuntu	1s
cpp-speculative_decoding_lm-ubuntu	1s
cpp-continuous-batching-macos	19m 49s
visual_language_chat_sample-ubuntu-minicpm_v2_6	1s
cpp-continuous-batching-ubuntu	1s
cpp-continuous-batching-windows	23m 37s
visual_language_chat_sample-ubuntu-internvl2	1s
visual_language_chat_sample-ubuntu-qwen2vl	1s
visual_language_chat_sample-ubuntu-llava_1_5 / visual_language_chat_sample-ubuntu-llava	1s
visual_language_chat_sample-ubuntu-llava_next / visual_language_chat_sample-ubuntu-llava	1s
ci/gha_overall_status_causal_lm	1s
	2h 8m 7s

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