[feature] Add a shared volume/directory between the collector and ingestor container for blob store

[pxp928]

Is your feature request related to a problem? Please describe.

With the addition of the blob store in PR #1630 to overcome the sizing issue for pub-sub (#731), there needs to be a shared volume/directory that docker-compose and helm can instantiate for local use between the collector and ingestor. This would allow the demos to run without needing to have an external blob store.

Describe the solution you'd like
Instantiate a local volume to be used by goCloud blob store (both docker-compose and helm) such that an external blob store is not needed.

The blob-addr: file:///path/to/dir will have to be updated to the new shared directory path.

Describe alternatives you've considered
instantiating an external blob store but that would require more maintenance