Remove `while True` in AgentController #5899

Job	Run time
Build Image (nikolaik/python-nodejs:python3.12-nodejs22, nikolaik)	3m 36s
Build App Image	7m 46s
RT Unit Tests (Root) (nikolaik)	10m 52s
RT Unit Tests (openhands) (nikolaik)	10m 50s
Update PR Description	6s
Verify Hash Equivalence in Runtime and Docker images (nikolaik)	58s
All Runtime Tests Passed	1s
All Runtime Tests Passed	0s
	34m 9s

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