Remove `while True` in AgentController #5763

Job	Run time
Build App Image	3m 24s
Build Image (nikolaik/python-nodejs:python3.12-nodejs22, nikolaik)	5m 41s
RT Unit Tests (Root) (nikolaik)	10m 50s
RT Unit Tests (openhands) (nikolaik)	10m 43s
Verify Hash Equivalence in Runtime and Docker images (nikolaik)	58s
Update PR Description	5s
All Runtime Tests Passed	1s
All Runtime Tests Passed	0s
	31m 42s

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