[C-Api] tensor meta handle

[C-Api] tensor meta handle

As we discussed, tensors metadata in c-api changed with info-handle instance.

1. alloc and destory functions are added for tensors-info handle.
2. refactors all functions and testcases with metadata handle.
3. update api description.

Signed-off-by: Jaeyun Jung <jy1210.jung@samsung.com>