Fix FirebaseDatabase integration test leftovers #3352

Job	Run time
integration	20m 0s
catalyst	4m 14s
pod-lib-lint (ios, macos-14, Xcode_15.2)	1h 19m 0s
spm-package-resolved	1m 2s
quickstart	1m 40s
pod-lib-lint (ios, macos-14, Xcode_16)	9m 36s
pod-lib-lint (tvos, macos-14, Xcode_15.2)	6m 50s
pod-lib-lint (tvos, macos-14, Xcode_16)	8m 39s
pod-lib-lint (macos --skip-tests, macos-14, Xcode_15.2)	5m 28s
pod-lib-lint (macos --skip-tests, macos-14, Xcode_16)	5m 23s
pod-lib-lint (watchos, macos-14, Xcode_15.2)	4m 2s
pod-lib-lint (watchos, macos-14, Xcode_16)	5m 15s
spm (iOS, macos-14, Xcode_15.2)	16m 42s
spm (iOS, macos-14, Xcode_16)	12m 9s
spm (tvOS, macos-14, Xcode_15.2)	6m 48s
spm (tvOS, macos-14, Xcode_16)	4m 34s
spm (macOS, macos-14, Xcode_15.2)	5m 53s
spm (macOS, macos-14, Xcode_16)	5m 51s
spm (catalyst, macos-14, Xcode_15.2)	5m 46s
spm (catalyst, macos-14, Xcode_16)	9m 2s
spm (watchOS, macos-14, Xcode_15.2)	5m 20s
spm (watchOS, macos-14, Xcode_16)	5m 23s
database-cron-only	0s
	3h 48m 37s

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