Add `knexIntegration` to Node

[mydea]

Description

We want to instrument knex. There is an existing OTEL instrumentation for this:

https://www.npmjs.com/package/@opentelemetry/instrumentation-knex

### Tasks
- [ ] Add new `knexIntegration` in `@sentry/node`
- [ ] This should set up the OTEL instrumentation
- [ ] Make sure to add an `origin` to all spans the integration emits
- [ ] This is a DB integration, make sure it aligns with the DB span schema we expect.
- [ ] Add node-integration-tests for the package
- [ ] The integration should be added by default

[github-actions]

A PR closing this issue has just been released 🚀

This issue was referenced by PR #13526, which was included in the 8.38.0 release.