cleanup(smart_autocomplete): remove smart autocomplete mv (#6867)

* Takes up too much space
* full table scan if the attribute doesn't exist

snuba/snuba_migrations/events_analytics_platform/0024_remove_smart_autocomplete_values_mv.py

@@ -0,0 +1,38 @@
+from typing import Sequence
+
+from snuba.clusters.storage_sets import StorageSetKey
+from snuba.migrations import migration, operations
+from snuba.migrations.operations import OperationTarget, SqlOperation
+
+
+class Migration(migration.ClickhouseNodeMigration):
+
+    blocking = False
+    storage_set_key = StorageSetKey.EVENTS_ANALYTICS_PLATFORM
+
+    local_table_name = "eap_trace_item_attrs_local"
+    dist_table_name = "eap_trace_item_attrs_dist"
+    mv_name = "eap_trace_item_attrs_mv"
+
+    def forwards_ops(self) -> Sequence[SqlOperation]:
+        return [
+            operations.DropTable(
+                storage_set=self.storage_set_key,
+                table_name=self.mv_name,
+                target=OperationTarget.LOCAL,
+            ),
+            operations.DropTable(
+                storage_set=self.storage_set_key,
+                table_name=self.local_table_name,
+                target=OperationTarget.LOCAL,
+            ),
+            operations.DropTable(
+                storage_set=self.storage_set_key,
+                table_name=self.dist_table_name,
+                target=OperationTarget.DISTRIBUTED,
+            ),
+        ]
+
+    def backwards_ops(self) -> Sequence[SqlOperation]:
+        # we won't go back!
+        return []