fix(experiments): tag experiment queries with product experiments (#42475)

Author: andehen

posthog/hogql_queries/experiments/experiment_query_runner.py

@@ -25,7 +25,7 @@
 from posthog.hogql.printer import to_printed_hogql
 from posthog.hogql.query import execute_hogql_query
 
-from posthog.clickhouse.query_tagging import tag_queries
+from posthog.clickhouse.query_tagging import Product, tag_queries
 from posthog.hogql_queries.experiments import MULTIPLE_VARIANT_KEY
 from posthog.hogql_queries.experiments.base_query_utils import (
     get_experiment_date_range,
@@ -582,6 +582,7 @@ def _evaluate_experiment_query(
         # Adding experiment specific tags to the tag collection
         # This will be available as labels in Prometheus
         tag_queries(
+            product=Product.EXPERIMENTS,
             experiment_id=self.experiment.id,
             experiment_name=self.experiment.name,
             experiment_feature_flag_key=self.feature_flag.key,