Support additional block adapters in unit tests

[N-o-Z]

Add the following block adapters to the unit test infrastructure:

• S3
• GCS
• Mem

[nopcoder]

@N-o-Z can close this one? as far as I remember you added this capability.

[N-o-Z]

Added the unit tests, but we didn't add these block adapters

[github-actions]

This issue is now marked as stale after 90 days of inactivity, and will be closed soon. To keep it, mark it with the "no stale" label.

[N-o-Z]

Missing mem adapted unit tests

[github-actions]

This issue is now marked as stale after 90 days of inactivity, and will be closed soon. To keep it, mark it with the "no stale" label.

[github-actions]

Closing this issue because it has been stale for 7 days with no activity.