Integrate the new schema documentation tooling into catalyst-voices, prior to working on DB schema updates there.

[neil-iohk]

Summary
Update Catalyst-Voices to use a version of Catalyst-CI that has the updated database schema tool

Description
Prior to updating Catalyst-Voices references for imports a tagged version of catalyst-ci is required.

IMPORT github.com/input-output-hk/catalyst-ci/earthly/docs:v3.2.16 AS docs-ci

As in the above example replace version and remove diagrams.json file from catalyst-voices repository.

The task here involves:

• Update references for Earthly imports to newer version of catalyst-ci tools which include schema spy functionality
• Remove diagrams.json from repository.