feat(node): Add integrations sdk information

[k-fish]

Summary

This adds 'integrations' to the sdk_info passed to ingest, mimics equivalent passing of integrations for python (see https://github.com/getsentry/sentry-python/blob/9fd938ed8762c06a8a1d355beb79f57c199ca92c/sentry_sdk/client.py#L197).

Saw this was missing when trying to figure out which of our db integrations sees the most use.