Fix index out of bounds error when building status (#3513) #3576
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Cherrypick of #3513
Problem: There's a specific scenario where we can hit an out of bounds index while building route statuses. I don't know the exact scenario, but it involves a parentRef without a sectionName, on a Gateway with a single listener. Could possibly involve having multiple implementations being deployed as well.
Solution: Adjust the logic to ensure we don't access indices that are out of bounds.
Testing: Verified that this error does not occur in the previous scenario.
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