Missing `ReportError` method did not allow casing multi-client interface to
`errorReporter` interface and dropping broken connections.
`replicationClient` embeds that interface, and it is widely used across
node's code. Embedded interface does not allow casting its parent structure
to `errorReporter` and breaks multi client error reporting logic.
Multi-client scheme is extremely hard to maintain, it makes unpredictable
casts and does not allow tracking code flow, so it will be refactored in the
future anyway.
Signed-off-by: Pavel Karpy <p.karpy@yadro.com>