tests: Add retry metrics tests to ITOtelGoldenMetrics #595

Job	Run time
filter	1m 7s
downstream-compatibility-spring-generator	11m 29s
downstream-compatibility (java-pubsublite)	3m 12s
downstream-compatibility (java-spanner-jdbc)	3m 48s
downstream-compatibility (java-bigquery)	3m 37s
downstream-compatibility (java-storage)	5m 17s
downstream-compatibility (java-pubsub)	3m 6s
downstream-compatibility (java-bigtable)	7m 34s
downstream-compatibility (java-firestore)	2m 56s
downstream-compatibility (java-spanner)	5m 26s
downstream-compatibility (java-storage-nio)	3m 32s
	51m 4s

Provide feedback