Remove `while True` in AgentController #5904

Job	Run time
Build Image (nikolaik/python-nodejs:python3.12-nodejs22, nikolaik)	4m 26s
Build App Image	5m 22s
RT Unit Tests (openhands) (nikolaik)	11m 9s
RT Unit Tests (Root) (nikolaik)	11m 1s
Update PR Description	5s
Verify Hash Equivalence in Runtime and Docker images (nikolaik)	59s
All Runtime Tests Passed	1s
All Runtime Tests Passed	0s
	33m 3s

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