node-api: remove deprecated attribute from napi_module_register

[vmoroz]

This PR targets to addresses the issue #56153 by removing the [[deprecated]] attribute from the napi_module_register function.

The code described in the issue does not use the napi_module_register function as it was intended from a module shared library. Instead, it uses it to register modules for embedding scenarios. While it was never the intended use, we currently do not have a better approach to register modules before Environment is created until we complete the new embedding API - PR #54660.

We discussed the issue in the Node-API meeting on Dec 6th 2024, and decided that the quickest and the least intrusive way to address it is to remove the [[deprecated]] attribute from the napi_module_register function for now.