Remove `while True` in AgentController #5905

Job	Run time
Build App Image	5m 34s
Build Image (nikolaik/python-nodejs:python3.12-nodejs22, nikolaik)	5m 52s
RT Unit Tests (openhands) (nikolaik)	10m 50s
RT Unit Tests (Root) (nikolaik)	10m 45s
Verify Hash Equivalence in Runtime and Docker images (nikolaik)	46s
Update PR Description	7s
All Runtime Tests Passed	1s
All Runtime Tests Passed	0s
	33m 55s

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