Fix of some minor bugs when using the driver manifest and update helm…

… chart versions (#4)

* Fix manifest creation caused by missing linebreaks

* Add empty option to description for metadataSource as possible entry

* Bump app version to 3.0.0 of csi driver in helm chart

Merge pull request #3 from cloudstack/multi-arch-support

Support multi-arch builds

Merge pull request #1 from cloudstack/cloudstack-csi-main

Update reference to point to the right repository