User story

The backend query for process instances is more powerful than what we currently expose in the UI. Users want to be as flexible as possible when selecting instances for migration, particularly including:

• Filtering for variables by value
• Selecting instances that are in a specific activity (activityIdIn parameter)
• A list of process instance Ids (processInstanceIdIn parameter)

Acceptance criteria

• All filter criteria of the POST process instance query (https://docs.camunda.org/manual/7.14/reference/rest/process-instance/post-query/) are exposed in the UI