tests(deletions): Add removed test

[armenzg]

This was removed in #102354 during an incident but #102369 has been merged since then.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
41780	1	41779	252

View the top 1 failed test(s) by shortest run time

tests.sentry.deletions.test_group.DeleteIssuePlatformTest::test_simple_issue_platform

Stack Traces | 6.74s run time

#x1B[1m#x1B[.../sentry/deletions/test_group.py#x1B[0m:439: in test_simple_issue_platform
    assert self.select_issue_platform_events(self.project.id) is None
#x1B[1m#x1B[31mE   AssertionError: assert {'event_id': '1741286afd0248968e02839f34db8587', 'group_id': 31, 'occurrence_id': '9c74890db9374cd4b9e3074636ea82cf'} is None#x1B[0m
#x1B[1m#x1B[31mE    +  where {'event_id': '1741286afd0248968e02839f34db8587', 'group_id': 31, 'occurrence_id': '9c74890db9374cd4b9e3074636ea82cf'} = <bound method DeleteIssuePlatformTest.select_issue_platform_events of <tests.sentry.deletions.test_group.DeleteIssuePlatformTest testMethod=test_simple_issue_platform>>(4557033689579522)#x1B[0m
#x1B[1m#x1B[31mE    +    where <bound method DeleteIssuePlatformTest.select_issue_platform_events of <tests.sentry.deletions.test_group.DeleteIssuePlatformTest testMethod=test_simple_issue_platform>> = <tests.sentry.deletions.test_group.DeleteIssuePlatformTest testMethod=test_simple_issue_platform>.select_issue_platform_events#x1B[0m
#x1B[1m#x1B[31mE    +    and   4557033689579522 = <Project at 0x7fb1509817e0: id=4557033689579522, team_id=None, name='Bar', slug='bar', organization_id=4557033689579520>.id#x1B[0m
#x1B[1m#x1B[31mE    +      where <Project at 0x7fb1509817e0: id=4557033689579522, team_id=None, name='Bar', slug='bar', organization_id=4557033689579520> = <tests.sentry.deletions.test_group.DeleteIssuePlatformTest testMethod=test_simple_issue_platform>.project#x1B[0m

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