Support `pino` for Sentry Structured Logs

Sentry now supports [Logs](https://docs.sentry.io/platforms/javascript/guides/node/logs/)!

We should add a `pinoIntegration` that will forward logs from [`pino`](https://github.com/pinojs/pino) to sentry.

This needs to live in @sentry/core, and work for all SDKs.