Add note about Tanzu kubeletDir

[nightkr]

Description

Fixes #574

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

# Author

# Reviewer
- [ ] Code contains useful comments
- [ ] Code contains useful logging statements
- [ ] (Integration-)Test cases added
- [ ] Documentation added or updated. Follows the [style guide](https://docs.stackable.tech/home/nightly/contributor/docs/style-guide).
- [ ] Changelog updated
- [ ] Cargo.toml only contains references to git tags (not specific commits or branches)

# Acceptance
- [ ] Feature Tracker has been updated
- [ ] Proper release label has been added
- [ ] [Roadmap](https://github.com/orgs/stackabletech/projects/25/views/1) has been updated

[sbernauer]

Thanks!

[sbernauer]

Can you please also update https://docs.stackable.tech/home/nightly/kubernetes/ to include the VMWare Tanzu provider?

[nightkr]

We could add a section for like.. "Unsupported but we have notes anyway". Either way, that should probably be a separate issue on the documentation repo?