[CPU] remove extra convert for fp16 #37616

Job	Run time
Smart_CI	26s
Docker	55s
Build / Build	7m 28s
Debian Packages	0s
OpenVINO JS API	0s
PyTorch Models tests	0s
ONNX Runtime Integration / ONNX Runtime Integration	4m 2s
OpenVINO tokenizers extension / OpenVINO tokenizers extension	1m 42s
C++ unit tests / C++ unit tests	47s
Samples / Samples	7m 47s
CPU functional tests / CPU functional tests	4m 55s
Python unit tests / Python unit tests	3m 36s
Pytorch Layer Tests / PyTorch Layer Tests	3m 1s
TensorFlow Models tests	0s
TensorFlow Layer Tests / TensorFlow Layer Tests	5m 9s
ci/gha_overall_status_linux_arm64	1s
	39m 49s

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