bigtable/admin/apiv2: TestIntegration_RestoreTable failed

This test failed! To configure my behavior, see [the Flaky Bot documentation](https://github.com/googleapis/repo-automation-bots/tree/main/packages/flakybot). If I'm commenting on this issue too often, add the `flakybot: quiet` label and I will stop commenting. --- commit: 48e886277128ebb93bea7e6ae1900d10e51d54eb buildURL: [Build Status](https://source.cloud.google.com/results/invocations/4147c464-7833-468a-8c23-f7b5a9df288c), [Sponge](http://sponge2/4147c464-7833-468a-8c23-f7b5a9df288c) status: failed