[mlir][llvmir][OpenMP] Translate affinity clause in task construct to llvmir (#182223)

Translate affinity entries to LLVMIR by passing affinity information to
createTask (__kmpc_omp_reg_task_with_affinity is created inside
PostOutlineCB).

3/3 in stack for implementing affinity clause with iterator modifier
1/3 #182218
2/3 #182222
3/3 #182223

GitOrigin-RevId: 2ad51ffbfae77ecb67e64ed8e7e833e54285f4c2