chore(rules): make Rule not optional in RuleBase

[cathteng]

No description provided.

[cathteng]

i don't think you can do this, i ran mypy and it failed

[codecov]

❌ 301 Tests Failed:

Tests completed	Failed	Passed	Skipped
24414	301	24113	300

View the top 3 failed test(s) by shortest run time

tests.sentry.api.endpoints.test_project_agnostic_rule_conditions.ProjectAgnosticRuleConditionsTest::test_simple

Stack Traces | 1.44s run time

#x1B[1m#x1B[.../api/endpoints/test_project_agnostic_rule_conditions.py#x1B[0m:13: in test_simple
    assert response.status_code == 200, response.content
#x1B[1m#x1B[31mE   AssertionError: b'{"detail":"Internal Error","errorId":null}'#x1B[0m
#x1B[1m#x1B[31mE   assert 500 == 200#x1B[0m
#x1B[1m#x1B[31mE    +  where 500 = <Response status_code=500, "application/json">.status_code#x1B[0m

tests.sentry.rules.conditions.test_event_attribute.EventAttributeConditionTest::test_render_label

Stack Traces | 1.89s run time

#x1B[1m#x1B[.../rules/conditions/test_event_attribute.py#x1B[0m:83: in test_render_label
    rule = self.get_rule(data={"match": MatchType.EQUAL, "attribute": "\xc3", "value": "\xc4"})
#x1B[1m#x1B[.../sentry/testutils/cases.py#x1B[0m:868: in get_rule
    return self.rule_cls(**kwargs)
#x1B[1m#x1B[31mE   TypeError: RuleBase.__init__() missing 1 required positional argument: 'rule'#x1B[0m

tests.sentry.rules.conditions.test_level_event.LevelConditionTest::test_render_label

Stack Traces | 1.92s run time

#x1B[1m#x1B[.../rules/conditions/test_level_event.py#x1B[0m:13: in test_render_label
    rule = self.get_rule(data={"match": MatchType.EQUAL, "level": "30"})
#x1B[1m#x1B[.../sentry/testutils/cases.py#x1B[0m:868: in get_rule
    return self.rule_cls(**kwargs)
#x1B[1m#x1B[31mE   TypeError: RuleBase.__init__() missing 1 required positional argument: 'rule'#x1B[0m

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