Consider using mocks generator where feasible

[czeslavo]

Is there an existing issue for this?

• I have searched the existing issues

Does this enhancement require public documentation?

• I have added an Acceptance Criteria item for adding and/or adjusting public documentation (if applicable)

Problem Statement

We use hand-written mocks in our tests. In most cases, they're simple enough so they could be auto-generated with tools like mockery. The goal of this issue is to convert hand-written mocks to mockery-generated ones where feasible.

Proposed Solution

No response

Additional information

No response

Acceptance Criteria

• Simple mocks are replaced with mockery-generated ones