fix: bundle should not start a new list entry

[bobh66]

What issue type does this pull request address? (keep at least one, remove the others)
/kind bugfix
/kind documentation

What does this pull request do? Which issues does it resolve? (use resolves #<issue_number> if possible)
resolves #1211

This fixes an issue where the bundle attribute was starting a new list entry and cutting off any provided chart information which is needed for extracting the tar file into a specific filename.

Also updated the documentation example and values.yaml files to provide more information on the init helm chart entries.

Please provide a short message that should be published in the vcluster release notes
Fixed an issue where vcluster could not apply more than one bundled helm chart.

What else do we need to know?
The init code assumes that the chart.name, chart.repo and chart.version are populated for both bundle and repo charts. The repo is not technically needed for bundled charts and the filename can be generated without it. Requiring the name and version for a bundled chart may seem a little odd, but it's the way the tar file name is determined, so unless that code gets refactored the chart.name and chart.version should be specified even for bundled charts.

[ThomasK33]

Hey @bobh66 👋

Thanks for the PR, LGTM