test: update unique constraint error expectations #5703

Job	Run time
compilation (ubuntu-latest, schema-engine-cli) / compile schema-engine-cli @ ubuntu-latest	3m 2s
compilation (ubuntu-latest, prisma-fmt) / compile prisma-fmt @ ubuntu-latest	1m 8s
compilation (windows-latest, prisma-fmt) / compile prisma-fmt @ windows-latest	2m 10s
compilation (windows-latest, schema-engine-cli) / compile schema-engine-cli @ windows-latest	9m 26s
compilation-push	-7s
	15m 39s

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