fix: flatten searchable os distribution fields (#81297)

<!-- Describe your PR here. -->
update to #69865
To search the distribution fields, we cannot have them in a hierarchy
`os.distribution.name`, we instead need them flattened to
`os.distribution_name`

This is part of reworking the following native-SDK PR:
getsentry/sentry-native#963

The update is also tracked on the docs side:
getsentry/sentry-docs#11936
And on Relay: getsentry/relay#4292

src/sentry/rules/conditions/event_attribute.py

@@ -63,8 +63,8 @@ def _handle(cls, path: list[str], event: GroupEvent) -> list[str]:
     "stacktrace.package": Columns.STACK_PACKAGE,
     "unreal.crashtype": Columns.UNREAL_CRASH_TYPE,
     "app.in_foreground": Columns.APP_IN_FOREGROUND,
-    "os.distribution.name": Columns.OS_DISTRIBUTION_NAME,
-    "os.distribution.version": Columns.OS_DISTRIBUTION_VERSION,
+    "os.distribution_name": Columns.OS_DISTRIBUTION_NAME,
+    "os.distribution_version": Columns.OS_DISTRIBUTION_VERSION,
 }
 
 
@@ -418,21 +418,14 @@ def _handle(cls, path: list[str], event: GroupEvent) -> list[str]:
 
 @attribute_registry.register("os")
 class OsAttributeHandler(AttributeHandler):
-    minimum_path_length = 3
+    minimum_path_length = 2
 
     @classmethod
     def _handle(cls, path: list[str], event: GroupEvent) -> list[str]:
-        if path[1] in ("distribution"):
-            if path[2] in ("name", "version"):
-                contexts = event.data.get("contexts", {})
-                os_context = contexts.get("os")
-                if os_context is None:
-                    os_context = {}
-
-                distribution = os_context.get(path[1])
-                if distribution is None:
-                    distribution = {}
-
-                return [distribution.get(path[2])]
-            return []
+        if path[1] in ("distribution_name", "distribution_version"):
+            contexts = event.data.get("contexts", {})
+            os_context = contexts.get("os")
+            if os_context is None:
+                os_context = {}
+            return [os_context.get(path[1])]
         return []

src/sentry/snuba/events.py

@@ -601,20 +601,20 @@ class Columns(Enum):
         alias="app.in_foreground",
     )
     OS_DISTRIBUTION_NAME = Column(
-        group_name="events.contexts[os.distribution.name]",
-        event_name="contexts[os.distribution.name]",
-        transaction_name="contexts[os.distribution.name]",
-        discover_name="contexts[os.distribution.name]",
-        issue_platform_name="contexts[os.distribution.name]",
-        alias="os.distribution.name",
+        group_name="events.contexts[os.distribution_name]",
+        event_name="contexts[os.distribution_name]",
+        transaction_name="contexts[os.distribution_name]",
+        discover_name="contexts[os.distribution_name]",
+        issue_platform_name="contexts[os.distribution_name]",
+        alias="os.distribution_name",
     )
     OS_DISTRIBUTION_VERSION = Column(
-        group_name="events.contexts[os.distribution.version]",
-        event_name="contexts[os.distribution.version]",
-        transaction_name="contexts[os.distribution.version]",
-        discover_name="contexts[os.distribution.version]",
-        issue_platform_name="contexts[os.distribution.version]",
-        alias="os.distribution.version",
+        group_name="events.contexts[os.distribution_version]",
+        event_name="contexts[os.distribution_version]",
+        transaction_name="contexts[os.distribution_version]",
+        discover_name="contexts[os.distribution_version]",
+        issue_platform_name="contexts[os.distribution_version]",
+        alias="os.distribution_version",
     )
     # Transactions specific columns
     TRANSACTION_OP = Column(

tests/sentry/rules/conditions/test_event_attribute.py

@@ -64,12 +64,7 @@ def get_event(self, **kwargs):
                 "unreal": {
                     "crash_type": "crash",
                 },
-                "os": {
-                    "distribution": {
-                        "name": "ubuntu",
-                        "version": "22.04",
-                    }
-                },
+                "os": {"distribution_name": "ubuntu", "distribution_version": "22.04"},
             },
             "threads": {
                 "values": [
@@ -824,24 +819,21 @@ def test_app_in_foreground(self):
         )
         self.assertDoesNotPass(rule, event)
 
-    def test_os_distribution_only(self):
-        event = self.get_event()
-        rule = self.get_rule(
-            data={"match": MatchType.EQUAL, "attribute": "os.distribution", "value": "irrelevant"}
-        )
-        self.assertDoesNotPass(rule, event)
-
     def test_os_distribution_name_and_version(self):
         event = self.get_event()
         rule = self.get_rule(
-            data={"match": MatchType.EQUAL, "attribute": "os.distribution.name", "value": "ubuntu"}
+            data={
+                "match": MatchType.EQUAL,
+                "attribute": "os.distribution_name",
+                "value": "ubuntu",
+            }
         )
         self.assertPasses(rule, event)
 
         rule = self.get_rule(
             data={
                 "match": MatchType.EQUAL,
-                "attribute": "os.distribution.version",
+                "attribute": "os.distribution_version",
                 "value": "22.04",
             }
         )
@@ -850,7 +842,7 @@ def test_os_distribution_name_and_version(self):
         rule = self.get_rule(
             data={
                 "match": MatchType.EQUAL,
-                "attribute": "os.distribution.name",
+                "attribute": "os.distribution_name",
                 "value": "slackware",
             }
         )
@@ -859,7 +851,7 @@ def test_os_distribution_name_and_version(self):
         rule = self.get_rule(
             data={
                 "match": MatchType.EQUAL,
-                "attribute": "os.distribution.version",
+                "attribute": "os.distribution_version",
                 "value": "20.04",
             }
         )