Support unfixed kv heads number #6173

Job	Run time
cpp-beam_search_causal_lm-ubuntu (./build/samples/cpp/beam_search_causal_lm/beam_search_causal_lm)	16m 31s
cpp-beam_search_causal_lm-ubuntu (python ./samples/python/beam_search_causal_lm/beam_search_causa...	16m 59s
cpp-greedy_causal_lm-windows	26m 33s
cpp-multinomial-greedy_causal_lm-ubuntu	14m 49s
cpp-beam_search_causal_lm-notus-7b-v1	14m 5s
cpp-beam_search_causal_lm-Phi-2	11m 31s
cpp-beam_search_causal_lm-Qwen1_5-7B-Chat	15m 1s
cpp-greedy_causal_lm-Qwen-7B-Chat	11m 13s
cpp-greedy_causal_lm-redpajama-3b-chat	12m 45s
cpp-Phi-1_5	8m 47s
cpp-prompt_lookup_decoding_lm-ubuntu	9m 13s
cpp-speculative_decoding_lm-ubuntu	13m 25s
cpp-chat_sample-ubuntu	14m 35s
cpp-continuous-batching-macos	15m 3s
cpp-continuous-batching-ubuntu	13m 15s
cpp-continuous-batching-windows	23m 41s
visual_language_chat_sample-ubuntu-internvl2	14m 24s
visual_language_chat_sample-ubuntu-minicpm_v2_6	7m 59s
visual_language_chat_sample-ubuntu-llava_1_5 / visual_language_chat_sample-ubuntu-llava	30m 45s
visual_language_chat_sample-ubuntu-llava_next / visual_language_chat_sample-ubuntu-llava	35m 29s
ci/gha_overall_status_causal_lm	1s
	5h 26m 4s

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