[Samples] merge LLM samples to "text_generation" folder #6601

Job	Run time
cpp-beam_search_causal_lm-ubuntu (./build/samples/cpp/text_generation/beam_search_causal_lm)	18m 23s
cpp-beam_search_causal_lm-ubuntu (python ./samples/python/text_generation/beam_search_causal_lm.py)	19m 16s
cpp-beam_search_causal_lm-Qwen1_5-7B-Chat	33m 38s
cpp-multinomial-greedy_causal_lm-ubuntu	15m 8s
cpp-greedy_causal_lm-Qwen-7B-Chat	12m 6s
cpp-greedy_causal_lm-windows	28m 16s
cpp-beam_search_causal_lm-notus-7b-v1	31m 9s
cpp-beam_search_causal_lm-Phi-2	11m 16s
cpp-prompt_lookup_decoding_lm-ubuntu	10m 37s
cpp-speculative_decoding_lm-ubuntu	12m 44s
cpp-chat_sample-ubuntu	14m 3s
cpp-continuous-batching-macos	23m 13s
cpp-continuous-batching-ubuntu	16m 3s
cpp-continuous-batching-windows	28m 22s
cpp-Phi-1_5	7m 44s
cpp-greedy_causal_lm-redpajama-3b-chat	11m 0s
visual_language_chat_sample-ubuntu-internvl2	23m 51s
visual_language_chat_sample-ubuntu-minicpm_v2_6	8m 34s
visual_language_chat_sample-ubuntu-llava_1_5 / visual_language_chat_sample-ubuntu-llava	31m 9s
visual_language_chat_sample-ubuntu-llava_next / visual_language_chat_sample-ubuntu-llava	36m 5s
ci/gha_overall_status_causal_lm	1s
	6h 32m 38s

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