(arch) Switch default runtime to EventStream Runtime (#3271)

* switch default to eventstream runtime

* remove pull docker from makefile

* fix unittest

* fix file store path

* try deprecate server runtime

* remove persist sandbox

* move file utils

* remove server runtime related workflow

* remove unused method

* attempt to remove the reliance on filestore for BE

* fix async for list file

* fix list_files to post

* fix list files

* add suffix to directory

* make sure list file returns abs path;
make sure other backend endpoints accpets abs path

* remove server runtime test workflow

* set git config in runtime

agenthub/dummy_agent/agent.py

@@ -208,9 +208,3 @@ class DummyAgent(Agent):
                 f' Unable to perform interactive browsing: {action.browser_actions}'
             )
         return MessageAction(content=message)
-
-    async def get_working_directory(self, state: State) -> str:
-        # Implement this method to return the current working directory
-        # This might involve accessing state information or making an async call
-        # For now, we'll return a placeholder value
-        return './workspace'