Increase timeout to all loadtest (#6631)

Author: iddqdex

ydb/tests/olap/lib/ydb_cli.py

@@ -75,10 +75,12 @@ def _try_extract_error_message(stderr: str) -> str:
                 '--executer', 'generic',
                 '--include', str(query_num),
                 '--iterations', str(iterations),
-                '--query-settings', "PRAGMA ydb.HashJoinMode='grace';" + get_external_param('query-prefix', ''),
                 '--plan', plan_path,
                 '--verbose'
             ]
+            query_preffix = get_external_param('query-prefix', '')
+            if query_preffix:
+                cmd += ['--query-settings', query_preffix]
             err = None
             try:
                 exec: yatest.common.process._Execution = yatest.common.process.execute(cmd, wait=False, check_exit_code=False)

ydb/tests/olap/load/conftest.py

@@ -10,7 +10,7 @@
 class LoadSuiteBase:
     iterations: int = 5
     workload_type: WorkloadType = None
-    timeout: float = 300.
+    timeout: float = 1800.
     refference: str = ''
 
     @property