Execute variant (already done with local push) and symbolize on batch (#3632)

Scaling issues seem to be solved.

Author: jonathanmetzman

src/clusterfuzz/_internal/bot/tasks/task_types.py

@@ -183,11 +183,11 @@ def execute(self, task_argument, job_type, uworker_env):
     'minimize': UTaskLocalExecutor,
     'progression': UTaskLocalExecutor,
     'regression': UTaskLocalExecutor,
-    'symbolize': UTaskLocalExecutor,
+    'symbolize': UTaskCombined,
     'unpack': TrustedTask,
     'postprocess': PostprocessTask,
     'uworker_main': UworkerMainTask,
-    'variant': UTaskLocalExecutor,
+    'variant': UTaskCombined,
 }