Remove v1 error usage from 04-channel/v2

[AdityaSripal]

Ref: #7456 (comment)

[DimitrisJim]

should be done for all v2 files, closing #7469 in preference to this (lets do all changes in 1 pr, should be easy to review fast)

[DimitrisJim]

has been completed just left open due to githubs clunky closing mechanics

[gjermundgaraba]

This issue was mistakenly reopened during some integration work, so closing again now.