Collapse Filtering Logic for Batch and Single User

[andrewkrug]

The endpoint: https://person.api.sso.mozilla.com/v2/user/primary_email/ and /v2/users /v2/users have slightly different filtering logic implemented.

Need to collapse the code from getUser and getUsers logic into shared code to ensure consistency.

As a bonus work item:

Cover the test case from the autonag setup.

    scope = {
        "classification": [
            "mozilla_confidential",
            "workgroup:staff_only",
            "public",
            "workgroup",
        ],
        "display": ["staff", "ndaed", "vouched", "authenticated", "public", "none"],
    }
    scope = " ".join(
        f"{key}:{value}" for key, values in scope.items() for value in values
    )

Where the caller is passing the following scopes and display levels to the API and failing to get staff information sometimes from /v2/users

Theory: This may only apply to contractors.

[andrewkrug]

This turns out to be the incorrect implementation of scopes on the client side. For integrity purposes though the issue will remain open to collapse the filtering logic.