[js/rn] Implement dispose native method (#16131)
### Description
<!-- Describe your changes. -->
Implement `dispose` react native method.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
Currently we are not able to release the memory used by model in JS
runtime if we don't want to use it anymore, we can do that only by
reload app on debug or restart app on release.
