Add backend check to prevent state admin from granting compact permission

[landonshumway-ia]

When the readSSN permission was added during development, the check for how it is granted at the compact level was not included in the utility function which verifies the caller's permission scopes to ensure a state admin cannot add permissions at the compact level. The UI prevents this, but in theory a state admin could call the API directly outside of the app UI, so this adds that auth check to prevent that.

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Reviewing files that changed from the base of the PR and between 625029d and 9bdb5ab.

📒 Files selected for processing (4)

• backend/compact-connect/lambdas/python/common/cc_common/utils.py
• backend/compact-connect/lambdas/python/staff-users/tests/function/test_handlers/test_patch_user.py
• backend/compact-connect/lambdas/python/staff-users/tests/function/test_handlers/test_post_user.py
• backend/compact-connect/lambdas/python/staff-users/tests/unit/test_collect_changes.py

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[jlkravitz]

LGTM! @isabeleliassen This is good to merge. Once merged, I will do a prod deploy since this is a hotfix.