Add performance statistics for speculative decoding test #6145

Job	Run time
cpp-multinomial-greedy_causal_lm-ubuntu	10m 17s
cpp-beam_search_causal_lm-Phi-2	10m 17s
cpp-beam_search_causal_lm-notus-7b-v1	10m 17s
cpp-beam_search_causal_lm-ubuntu (./build/samples/cpp/beam_search_causal_lm/beam_search_causal_lm)	10m 20s
cpp-beam_search_causal_lm-Qwen1_5-7B-Chat	10m 17s
cpp-beam_search_causal_lm-ubuntu (python ./samples/python/beam_search_causal_lm/beam_search_causa...	10m 15s
cpp-greedy_causal_lm-Qwen-7B-Chat	10m 16s
cpp-greedy_causal_lm-windows	9m 59s
cpp-Phi-1_5	8m 24s
cpp-prompt_lookup_decoding_lm-ubuntu	10m 8s
cpp-speculative_decoding_lm-ubuntu	10m 14s
cpp-chat_sample-ubuntu	10m 15s
cpp-continuous-batching-macos	10m 15s
cpp-continuous-batching-ubuntu	10m 18s
cpp-continuous-batching-windows	10m 1s
cpp-greedy_causal_lm-redpajama-3b-chat	10m 16s
visual_language_chat_sample-ubuntu-internvl2	10m 16s
visual_language_chat_sample-ubuntu-minicpm_v2_6	9m 1s
visual_language_chat_sample-ubuntu-llava_1_5 / visual_language_chat_sample-ubuntu-llava	10m 16s
visual_language_chat_sample-ubuntu-llava_next / visual_language_chat_sample-ubuntu-llava	10m 14s
ci/gha_overall_status_causal_lm	1s
	3h 21m 37s

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