Add docs for local kubeflow + local metadata store

[schustmi]

Describe changes

Based on a Slack-Thread, this PR adds information on how to access the local metadata store with local kubeflow.

Pre-requisites

Please ensure you have done the following:

• [x] I have read the CONTRIBUTING.md document.
• [x] If my change requires a change to docs, I have updated the documentation accordingly.
• [ ] If I have added an integration, I have updated the integrations table and the corresponding website section.
• [ ] I have added tests to cover my changes.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] Other (add details above)