[PT FE] Use GroupNormalization for aten::group_norm instead of MVN #27217

Job	Run time
Smart_CI	36s
Docker	53s
Build	7m 38s
Debian Packages	0s
Samples	0s
OpenVINO JS API	0s
CPU functional tests	0s
ONNX Runtime Integration	0s
OpenVINO tokenizers extension	0s
PyTorch Models tests	0s
C++ unit tests / C++ unit tests	55s
Python unit tests / Python unit tests	9m 32s
TensorFlow Models tests	0s
TensorFlow Layer Tests	0s
ci/gha_overall_status_linux_arm64	1s
	19m 35s

Provide feedback