PXP-2403 fix duplicate project id bug

[mysterious-progression]

OPEN projects are double counted because they appear in both open read access privileges and authorized user level privileges. Bug fix makes sure peregrine is aware of this and does not add project_ids to list of projects if it is already in the list because it's an open project.

https://ctds-planx.atlassian.net/browse/PXP-2403

Bug Fixes

Fix bug where project id count returns 2 instead of 1

[github-actions[bot]]

The style in this PR agrees with black. :heavy_check_mark:

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[paulineribeyre]

awesome!!!