1. Add API for function `wc_UnloadStaticMemory()` which frees the mutex used by the static memory pool. 2. Update the `wc_LoadStaticMemory_ex()` test to free the static memory pool's mutex on each successful test case.
1. Add API for function `wc_UnloadStaticMemory()` which frees the mutex used by the static memory pool. 2. Update the `wc_LoadStaticMemory_ex()` test to free the static memory pool's mutex on each successful test case.