Automatically add domain managers as members to a portfolio (script)

[abroddrick]

Issue description

As a project/program lead,
I want to ensure that when M4/M5 are turned on for org model members that all current domain managers (including invited ones) are added as members of the portfolio
so that we don't have a scenario where only some managers of Org model domains see the org model view, while others see the non org model view. But, I don't want these members to receive an email, as that may seem odd to them.

Without this feature, someone would need to manually find all domain managers and manually make portfolio invitations, etc, for each user and repeat this for ALL domains in the org. That would be very tedious.

Acceptance criteria

• add a new parameter to the portfolio generation script so that it will add all domain managers of a portfolio's domains (including ones in the invited state) to the org.
  • note this means they should be added to the correct org model group as well as have portfolio invitations created for them
• ensure the same logic for portfolio invitations/permissions is maintained such that if a manager is an existing user, their invitation is "auto retrieved" and a portfolio permission is made
• No emails should send to users when the portfolio invitations are made
• Ensure errors are logged in an easy to troubleshoot way (such as an additional summary at the end)
• we should be able to add domain managers to existing portfolios as well with this script (we have a few already on stable that we will need to run this for)

Additional context

No response

Links to other issues

No response

[abroddrick]

*Technically if we onboard people with only a few domain managers to M4/m5 first, then we do not need this for launch. (Fyi @katypies and @PaulKuykendall for your awareness as I put it in the milestone)