Add the ability to define board configuration through the REST API

Problem Description

At the moment, we have endpoints to view board settings. ie 

• Get board settings: GET /rest/agile/1.0/board/{boardId}
• Get board property: GET /rest/agile/1.0/board/{boardId}/properties/{propertyKey}
• Full listing of board public APIs: https://developer.atlassian.com/cloud/jira/software/rest/api-group-board/#api-group-board

However, there is no public endpoint in Cloud to allow for board configuration mutation. Ie, update the Board Administrator field via rest API, configure swimlanes or specify the columns of a board

Solution

Allow for the possibility, ie via API endpoint, to perform board configuration updates. 

Workaround

No workaround available

Original Description

The Jira Software REST API doesn't allow the columns of a board to be specified or configuring swimlanes when creating a board. It also doesn't allow the columns of an existing board to be updated/modified. It is suggested that the API be expanded to include these features.