feat tests: disable metrics test in non in-house builds

Tests: протестировано CI и локально
commit_hash:bff9f8c5d6215bf22855b8149d80271669899fdf

Author: apolukhin

ydb/functional_tests/basic/tests-metrics/test_metrics.py

@@ -1,3 +1,4 @@
+import os
 import re
 
 import pytest
@@ -50,6 +51,7 @@ def _hide_metrics_values(metrics: str) -> str:
     return '\n'.join(line.rsplit('\t', 1)[0] for line in metrics.splitlines())
 
 
+@pytest.mark.skipif(not os.environ.get('TESTSUITE_ARCADIA_RUN'), reason='Native metrics flap in the outer world')
 async def test_metrics(monitor_client, load, force_metrics_to_appear):
     ground_truth = _normalize_metrics(load('metrics_values.txt'))
     all_metrics = await monitor_client.metrics_raw(output_format='pretty')