Docs update: document transition from the Whitelist constraint to the sig constraint

Description

Needs to cover the steps a cordapp developer, a node owner and the zone operator need to make in order to transition to the new signature constraint, when they were previously using the Whitelist constraint.
This needs to include sample code in the docs

Assignee

Tudor Malene

Reporter

Tudor Malene

Labels

Sprint

None

Epic Link

None

Priority

High

Engineering Teams

None

Fix versions

Affects versions

None

Ported to...

None

Story Points / Dev Days

2

Build cut

None
Configure