[CPU] FullyConnected: corrected BF16 config in case of f16 weights #18477

Job	Run time
Smart_CI	18s
Docker	1m 0s
Build / Build	16m 37s
C++ unit tests / C++ unit tests	1m 8s
Debian Packages / Debian Packages	1m 46s
JAX Layer Tests / JAX Layer Tests	2m 13s
Python API tests / Python API tests	1m 54s
Python unit tests / Python unit tests	3m 50s
OpenVINO tokenizers extension / OpenVINO tokenizers extension	2m 31s
Samples / Samples	4m 56s
Pytorch Layer Tests / PyTorch Layer Tests	16m 27s
TensorFlow Layer Tests / TensorFlow Layer Tests	13m 52s
ci/gha_overall_status_ubuntu_24	1s
	1h 6m 33s

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