Release `2.0.0`
# Highlights
_<here-goes-the-summary...>_ # Detailed Changelogs
🚀 PR to release NeMo `2.0.0`.

📝 Please remember the following to-do's before merge:
- [ ] Fill-in the comment `Highlights`
- [ ] Review the comment `Detailed Changelogs`

🚨 Please also keep in mind to _not_ delete the headings of the task commits. They are required by the post-merge automation.

🙏 Please merge this PR only if the CI workflow completed successfully.