Allow pageserver unreachable errors in test_scrubber_tenant_snapshot (#…

…10585)

## Problem

test_scrubber_tenant_snapshot restarts pageservers, but log validation
fails tests on any non white listed storcon warnings, making the test
flaky.

## Summary of changes

Allow warns like
2025-01-29T12:37:42.622179Z WARN reconciler{seq=1
tenant_id=2011077aea9b4e8a60e8e8a19407634c shard_id=0004}: Call to node
2 (localhost:15352) management API failed, will retry (attempt 1):
receive body: error sending request for url
(http://localhost:15352/v1/tenant/2011077aea9b4e8a60e8e8a19407634c-0004/location_config):
client error (Connect)

ref #10462

test_runner/regress/test_storage_scrubber.py

@@ -32,6 +32,12 @@ def test_scrubber_tenant_snapshot(neon_env_builder: NeonEnvBuilder, shard_count:
     neon_env_builder.num_pageservers = shard_count if shard_count is not None else 1
 
     env = neon_env_builder.init_start()
+    # We restart pageserver(s), which will cause storage storage controller
+    # requests to fail and warn.
+    env.storage_controller.allowed_errors.append(".*management API still failed.*")
+    env.storage_controller.allowed_errors.append(
+        ".*Reconcile error.*error sending request for url.*"
+    )
     tenant_id = env.initial_tenant
     timeline_id = env.initial_timeline
     branch = "main"