openvino

626f7945 - [GPU] Support 4-D non-grouped weights in ConvertFCToCompressed (#35596)

[GPU] Support 4-D non-grouped weights in ConvertFCToCompressed (#35596) A 4-D weight Constant with only the last two dims non-unit (e.g. [1, 1, K, N]) hit an OPENVINO_ASSERT and dropped off the compressed-FC path. Add a branch that flattens such shapes to the 2-D layout the compressed-FC kernel expects, and a unit test covering it. ### Tickets: - [183843](https://jira.devtools.intel.com/browse/CVS-183843) --------- Co-authored-by: Eddy Kim <eddy.kim@intel.com>