Fix memory sharing (#2415)

- Inherit shared memory from the parent instance, instead of
  trying to look it up by the underlying module. The old method
  works correctly only when every cluster uses different module.
- Use reference count in WASMMemoryInstance/AOTMemoryInstance
  to mark whether the memory is shared or not
- Retire WASMSharedMemNode
- For atomic opcode implementations in the interpreters, use
  a global lock for now
- Update the internal API users
  (wasi-threads, lib-pthread, wasm_runtime_spawn_thread)

Fixes https://github.com/bytecodealliance/wasm-micro-runtime/issues/1962

core/iwasm/libraries/lib-pthread/lib_pthread_wrapper.c

@@ -581,7 +581,7 @@ pthread_create_wrapper(wasm_exec_env_t exec_env,
 #endif
 
     if (!(new_module_inst = wasm_runtime_instantiate_internal(
-              module, true, exec_env, stack_size, 0, NULL, 0)))
+              module, module_inst, exec_env, stack_size, 0, NULL, 0)))
         return -1;
 
     /* Set custom_data to new module instance */