fix(auth): handle uniqueness of ApiAuthorization per org

[sentaur-athena]

I added a new unique index in https://github.com/getsentry/sentry/pull/80996 and this PR is using it in code.

Basically:

1. If organization id is null then ApiAuthorization of an app must be unique per user
2. If organization id is not null then ApiAuthorization of an app must be unique per user and org (per organization member)

[codecov[bot]]

:x: 611 Tests Failed:

Tests completed	Failed	Passed	Skipped
23117	611	22506	215

View the top 3 failed tests by shortest run time

> > ```python > tests.snuba.search.test_backend.EventsJoinedGroupAttributesSnubaSearchTest::test_date_filter > ``` > >

Stack Traces | 0.006s run time

> > > > > ```python > > No failure message available > > ``` > >

tests.snuba.search.test_backend.EventsJoinedGroupAttributesSnubaSearchTest::test_not_perf_category

Stack Traces | 0.006s run time

> > ```python > No failure message available > ```

tests.snuba.search.test_backend.EventsJoinedGroupAttributesSnubaSearchTest::test_query_timestamp

Stack Traces | 0.006s run time

> > ```python > No failure message available > ```

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