fix partition set name for runs feed tests (#25408)

## Summary & Motivation
updates the partition_set name in a test so that it conforms to the
expected pattern
https://github.com/dagster-io/dagster/blob/master/python_modules/dagster/dagster/_core/remote_representation/external_data.py#L1800

important for dagster-io/internal#12131 since it
relies on the job name of a backfill being stored correctly. it's not
stored correctly if the test uses the wrong format

## How I Tested These Changes

python_modules/dagster-graphql/dagster_graphql_tests/graphql/test_runs_feed.py

@@ -3,6 +3,7 @@
 
 import pytest
 from dagster._core.execution.backfill import BulkActionStatus, PartitionBackfill
+from dagster._core.remote_representation.external_data import partition_set_snap_name_for_job_name
 from dagster._core.remote_representation.origin import RemotePartitionSetOrigin
 from dagster._core.storage.dagster_run import DagsterRun, DagsterRunStatus
 from dagster._core.storage.tags import BACKFILL_ID_TAG
@@ -930,7 +931,7 @@ def test_get_runs_feed_filter_job_name(self, graphql_context):
 
         partition_set_origin = RemotePartitionSetOrigin(
             repository_origin=repository.get_remote_origin(),
-            partition_set_name="foo_partition",
+            partition_set_name=partition_set_snap_name_for_job_name("foo"),
         )
         for _ in range(3):
             _create_run(graphql_context, job_name="foo")
@@ -942,7 +943,7 @@ def test_get_runs_feed_filter_job_name(self, graphql_context):
 
         partition_set_origin = RemotePartitionSetOrigin(
             repository_origin=repository.get_remote_origin(),
-            partition_set_name="bar_partition",
+            partition_set_name=partition_set_snap_name_for_job_name("bar"),
         )
         for _ in range(3):
             _create_run(graphql_context, job_name="bar")