[UR][CUDA] Add metadata injection for CUDA conformance tests
Conformance tests use raw device binaries without .prop metadata files.
Add helper methods to populate known kernel metadata (reqd_work_group_size
and reqd_sub_group_size) for fixed_wg_size and fixed_sg_size test kernels.
This ensures the CUDA adapter receives proper metadata when querying
UR_KERNEL_GROUP_INFO_COMPILE_WORK_GROUP_SIZE and
UR_KERNEL_SUB_GROUP_INFO_COMPILE_NUM_SUB_GROUPS.
