ref: use a better hashing algorithm for test bucketing

[asottile-sentry]

No description provided.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
24964	1	24963	299

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

tests.sentry.utils.mockdata.test_core.TestMockData::test_main_default_setup

Stack Traces | 98.3s run time

#x1B[1m#x1B[.../utils/mockdata/test_core.py#x1B[0m:80: in test_main_default_setup
    assert Environment.objects.count() == 6, "Should environments"
#x1B[1m#x1B[31mE   AssertionError: Should environments#x1B[0m
#x1B[1m#x1B[31mE   assert 8 == 6#x1B[0m
#x1B[1m#x1B[31mE    +  where 8 = <bound method QuerySet.count of <sentry.db.models.manager.base.BaseManager object at 0x7f983dd28ec0>>()#x1B[0m
#x1B[1m#x1B[31mE    +    where <bound method QuerySet.count of <sentry.db.models.manager.base.BaseManager object at 0x7f983dd28ec0>> = <sentry.db.models.manager.base.BaseManager object at 0x7f983dd28ec0>.count#x1B[0m
#x1B[1m#x1B[31mE    +      where <sentry.db.models.manager.base.BaseManager object at 0x7f983dd28ec0> = Environment.objects#x1B[0m

To view more test analytics, go to the Test Analytics Dashboard
_{📋 Got 3 mins? Take this short survey to help us improve Test Analytics.}