test: fix "run healthcheck" bindings test

[nimdrak]

Fixed #27118

Does this PR introduce a user-facing change?

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[nimdrak]

/assign

[baude]

@nimdrak nice catch ... we have really odd hardware sometimes for tests; i'm wondering if we should do a backoff instead of a straight 1 second wait? i.e. time := 500 * time.millisecond and then time := time + time with a loop iteration of like 5 or 6 ? wdyt ?