[GPU] Make singleton OCL Context #52972

Job	Run time
Smart_CI	21s
Docker	48s
Build / Build	19m 23s
Conformance (API)	4m 42s
Conformance (OP)	11m 36s
Samples / Samples	6m 40s
Debian Packages / Debian Packages	1m 27s
OpenVINO JS API / OpenVINO JS API	1m 33s
NVIDIA plugin	3m 6s
GPU_Stub	4s
ONNX Models Tests / ONNX Models tests	12m 5s
Python unit tests / Python unit tests	7m 9s
Python API tests / Python API tests	4m 24s
Pytorch Layer Tests / PyTorch Layer Tests	45m 0s
OpenVINO tokenizers extension / OpenVINO tokenizers extension	4m 43s
Pytorch FX Layer Tests / PyTorch FX Layer Tests	23m 25s
CPU functional tests / CPU functional tests	27m 13s
JAX Layer Tests / JAX Layer Tests	3m 31s
iGPU Tests (unit) / GPU	54m 10s
iGPU Tests (func) / GPU	44m 17s
C++ unit tests / C++ unit tests	15m 2s
dGPU Tests	0s
ONNX Runtime Integration	0s
TensorFlow Models tests / TensorFlow Models tests	11m 57s
PyTorch Models tests / PyTorch Models tests	29m 11s
Keras 3 OpenVINO Backend Tests / Keras 3 OpenVINO Backend	7m 28s
JAX/Flax Models tests / JAX/Flax Models tests	2m 55s
TensorFlow Layer Tests / TensorFlow Layer Tests	15m 23s
TensorFlow Hugging Face Models tests	0s
PyTorch Models Nightly Scope2 tests	0s
TensorFlow TF Hub Models tests	0s
PyTorch Models Nightly Scope1 tests	0s
ci/gha_overall_status	2s
	5h 57m 35s

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