Add dictionary settings to make report approval workflow optional

[gjvoosten]

When so defined in the dictionary, the report approval workflow and/or report planning approval workflow can be made optional.

Closes AB#997

User changes

• None

Superuser changes

• None

Admin changes

• None

System admin changes

• anet.yml or anet-dictionary.yml needs change
  Add a dictionary entry like this:

  reportWorkflow:
    optionalApprovalWorkflow: false
    optionalPlanningApprovalWorkflow: true
  

  for backwards-compatibility with previous behaviour.
  Setting optionalApprovalWorkflow to true makes the report approval workflow optional; this means that you don't have to set a default approval organization in the admin settings, or (when set) that you don't have to define an approval workflow for the default approval organization.
  Setting optionalPlanningApprovalWorkflow to false makes the planning approval workflow required.
• db needs migration
• documentation has changed
• graphql schema has changed

Checklist

• Described the user behavior in PR body
• Referenced/updated all related issues
• commits follow a repo#issue: Title title format and these 7 rules
• commits have a clean history, otherwise PR may be squash-merged
• Added and/or updated unit tests
• Added and/or updated e2e tests
• Added and/or updated data migrations
• Updated documentation
• Resolved all build errors and warnings
• Opened debt issues for anything not resolved here